.300 OSSM Questions

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.300 OSSM Questions

Postby mikeinlouisiana » Tue Oct 27, 2009 5:20 pm

It's hard to find out any information from the Oly website. I can't find any information on the Gamestalker upper.
Is the .300 OSSM based on 25 WSSM brass? Will Oly offer brass for reloading? Is this the same caliber as the 300/25WSSM that Dtech is building?

sorry for so many questions. Curiosity killed the cat but satisfaction brought him back.

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Postby Globemaster » Tue Oct 27, 2009 7:21 pm

mikeinlouisiana wrote: It's hard to find out any information from the Oly website. I can't find any information on the Gamestalker upper.

there use to be this information posted on the Olympic Arms website:

Globemaster wrote:<<< Directly from the front page of the Olympic Arms website >>>

Ever think your AR-15 could have as much punch as an 30-06 well now it can.

The .300 OSSM has been put through the testing stage by a major powder manufacturer, and has shown that is it not only out runs .308 but also out runs 30-06! 30-06 with a 150 grain bullet runs 2792 fps, but the .300 OSSM (.300 Olympic Super Short Mag) is running 3040 fps with the same bullet. The proof they say is in the pudding, below is a link to the Data Sheets from the company that tested the .300 OSSM, the same sheets SAMMI is going to use to standardize the cartridge, also a link to some ballistic tests of 30-06 for comparison, you be the judge.


mikeinlouisiana wrote: Is the .300 OSSM based on 25 WSSM brass?

IIRC? it’s based off the .243 WSSM case, but the stuff that we shot at the OACADR-IV Event was all 25WSSM brass; as well as the few boxes of ammunition that I recently purchased.

mikeinlouisiana wrote: Will Oly offer brass for reloading?

I don’t know? but maybe HSM® will? and I know that Olympic Arms will be Selling the OSSM ammunition.

Rattler wrote: HSM out of Stevensville, MT is making the ammo. A decision has been made as of this week that the ammo will be available for sale through Olympic Arms in the very near future. Oly just ordered 15K rounds!


mikeinlouisiana wrote: Is this the same caliber as the 300/25WSSM that Dtech is building?

yeah I think they’re real similar, as I emailed Dtech and we talked about it a little … he said he needed to check his drawings and would get back to me.

mikeinlouisiana wrote: sorry for so many questions. Curiosity killed the cat but satisfaction brought him back.

yeah, I know what ya mean … :D

web link >>> New 300 Olympic Short Magnum Ballistic Info:

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Postby mikeinlouisiana » Wed Oct 28, 2009 4:49 am

I quess I was hoping for someone to make a new brass for the .300. The WSSM Winchester brass I purchase recently has splits and cracks in the necks and only getting 1 or 2 reloads with.

The rifle in the picture is the K8 model not the Game Stalker correct?

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Postby Ductapeman » Wed Oct 28, 2009 5:12 am

The word I got is that only the first batch or two of brass will be rollmarked ".25 WSSM"-- after that it will all be marked ".300 OSSM" or to that effect. Hopefully it will all be new-made for the purpose-- the first batch was resized from .25 WSSM, as indicated in the rollmark. Olympic doesn't make ammunition, so HSM will be in control of the production. Oly will have ammo, and we already have Hornady dies-- haven't heard about brass yet. :wink:
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Postby Globemaster » Wed Oct 28, 2009 8:42 am

mikeinlouisiana wrote: I guess I was hoping for someone to make a new brass for the .300

like Ductapmen stated in the previous post (they) HSM™ will be manufacturing a dedicated case for this 300-OSSM cambering, sometime in the future.

mikeinlouisiana wrote: The WSSM Winchester brass I purchase recently has splits and cracks in the necks and only getting 1 or 2 reloads with.

Q: is this Winchester® 25WSSM brass? and what brand® reloading press are you using?

mikeinlouisiana wrote: The rifle in the picture is the K8 model not the Game Stalker correct?

no that is incorrect! … that is in fact the GameStalker® Rifle in this image, in black finish; with the light weight trimmed down, and fluted barrel in the satin finish; and the light weight trimmed/slotted FF handguard.

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Postby mikeinlouisiana » Wed Oct 28, 2009 9:17 am

is this Winchester® 25WSSM brass?


I am using Winchester brass, to my knowledge that is the only company making WSSM brass.

what brand® reloading press are you using?


I use RCBS Rock chucker.

no that is incorrect! … that is in fact the GameStalker® Rifle in this image, in black finish; with the light weight trimmed down, and fluted barrel in the satin finish; and the light weight trimmed/slotted FF handguard.


My bad It did not look like the barrel was fluted. It looked smooth, but I am old and half blind.

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Postby Evil_Lurker » Wed Oct 28, 2009 9:53 am

My bad It did not look like the barrel was fluted.


I think it's just fluted under the handguard. Look close.
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Postby 9x19MdM » Wed Oct 28, 2009 10:21 am

Evil_Lurker wrote:
My bad It did not look like the barrel was fluted.


I think it's just fluted under the handguard. Look close.


It may just be a shadow, but in this one it does look like it's fluted past the handguard.

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Postby Rattler » Wed Oct 28, 2009 10:46 am

Just a shadow, they will be fluted under the handguard only. Otherwise you'd have to go with a heavier diameter barrel forward of the FSB/Gas block, meaning more weight, which defeats the purpose of the fluting.
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Postby Globemaster » Wed Oct 28, 2009 12:31 pm

mikeinlouisiana wrote:I am using Winchester brass, to my knowledge that is the only company making WSSM brass.

yeah, I knew that ... I just wanted to know if it was "25WSSM" brass or “243WSSM” brass that was splitting on you?

:D
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Postby mikeinlouisiana » Wed Oct 28, 2009 2:10 pm

Can someone tell me how much the ammo cost?

Thanks
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Postby Globemaster » Wed Oct 28, 2009 4:25 pm

most likely? … a bit over $2 dollars per ‘Bang’ :wink:
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Postby mikeinlouisiana » Wed Oct 28, 2009 5:26 pm

Globemaster wrote:yeah, I knew that ... I just wanted to know if it was "25WSSM" brass or “243WSSM” brass that was splitting on you?

:D


Yes it was 25 WSSM Brass. Here is a pic of once fired brass. The 3 empty casing are twice fired. It is not loaded hot. I am going to have to pay more attention to case prep. Sorry picture not good, I could use a new camera but choosing a new upper! :D

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most likely? … a bit over $2 dollars per ‘Bang’


ouch hope someone makes brass!
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Postby Globemaster » Wed Oct 28, 2009 6:02 pm

mikeinlouisiana wrote: Yes it was 25 WSSM Brass. Here is a pic of once fired brass. The 3 empty casing are twice fired. It is not loaded hot. I am going to have to pay more attention to case prep.

I have had only (1) “New” 25WSSM case do that, as I was reloading on the borrowed Dillon™ Press … maybe it’s a “LOT” or "Batch" thing?

mikeinlouisiana wrote: Sorry picture not good, I could use a new camera but choosing a new upper! :D

I know what ya mean … I Sold off my K23P and a BushMaster XM carbine to make room for the 300-OSSM ‘UR’ :D
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Postby Evil_Lurker » Thu Oct 29, 2009 12:02 am

The only problems I've had with split necks in rifles were with Winchester brass. I had two split on the first firing a few years back. (new WW .308 Win. brass and a medium load).
I've seen other people post with the same experience, all Win. brass that split on the first firing.
I've also had real good luck with other WW lots and got multiple reload cycles out of it.
If I was going to form it, I'd anneal the neck/shoulder area and see if that didn't solve it.
It's a batch issue, for sure.
I'm not 100% sure it's an annealing issue, but it sure appears that way.
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Postby Globemaster » Thu Oct 29, 2009 8:10 am

Evil_Lurker wrote: The only problems I've had with split necks in rifles were with Winchester brass.

In twenty years of reloading, I’ve never seen, nor experienced this type of case failure.

Evil_Lurker wrote: I had two split on the first firing a few years back. (new WW .308 Win. brass and a medium load).

I try to never load … “Max”

Evil_Lurker wrote: I've seen other people post with the same experience, all Win. brass that split on the first firing.

is this a recent phenomenon?

Evil_Lurker wrote: I've also had real good luck with other WW lots and got multiple reload cycles out of it.

I would expect to get 5-6 firings from the 25WSSM

Evil_Lurker wrote: If I was going to form it, I'd anneal the neck/shoulder area and see if that didn't solve it.

I need to try the ‘water/pan/tip over annealing’ … sometime

Evil_Lurker wrote: It's a batch issue, for sure.

yeah … I think so too! … Q: what else could it be?

Evil_Lurker wrote: I’m not 100% sure it's an annealing issue, but it sure appears that way.

hey mikeinlouisiana, have you annealed this brass pictured in the image above?
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Postby Thom » Thu Oct 29, 2009 12:30 pm

Having a hard time finding case dimension data on the .300 OSSM, it has to be someplace obvious that I am overlooking, can you help?
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Postby Evil_Lurker » Thu Oct 29, 2009 2:07 pm

I try to never load … “Max”


Mine weren't anywhere near max. , they're midrange loads from the Nosler data.
165 gr. Nosler Partition 45.0 gr. W748



is this a recent phenomenon?


It happened to me over 5 years ago, but we had a case of it on Predatormasters hunting board within the last 6 weeks, and several people replied they had experienced the same thing, and on the first or second cycle through the rifle.



http://www.predatormastersforums.com/forums/ubbthreads.php?ubb=showflat&Number=1365481#Post1365481
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Postby Globemaster » Thu Oct 29, 2009 3:36 pm

Thom wrote:Having a hard time finding case dimension data on the .300 OSSM, it has to be someplace obvious that I am overlooking, can you help?

I can’t locate anything either on the HSM® website? if you like? I can certainly measure up a loaded round and give what I can from a box that I have on hand … but they are 25WSSM cases.

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Postby Thom » Thu Oct 29, 2009 4:04 pm

I wonder if it has been summited for SAMMI Specs? If so the data should be available, but I can't find it.

I am curious as to the @ case diameter at the shoulder. (Already got wildcatitis on the brain). . .
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Postby mikeinlouisiana » Thu Oct 29, 2009 6:02 pm

Globemaster wrote:
hey mikeinlouisiana, have you annealed this brass pictured in the image above?


Yes all brass was annealed. The cases looked like it was loaded hot but it is about mid range. I have had about 10 cases split like this out of 300 cases. I think it was a bad batch of brass. I got some new bags of brass that I will inspect closely. I bought one of those magnifier glass lights that mount on your table. I can get real up close view.

I sent Hunting shack an email and asked them about brass for reloading. The responded I must contact Olympic Arms for that information.

Globemaster do you have .300 OSSM ammo in hand?

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Postby Globemaster » Thu Oct 29, 2009 6:39 pm

mikeinlouisiana wrote: I sent Hunting shack an email and asked them about brass for reloading. The responded I must contact Olympic Arms for that information.

that’s weird … I wonder why that is?

mikeinlouisiana wrote: Globemaster do you have .300 OSSM ammo in hand?

yes, I have some on hand … why?
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Postby mikeinlouisiana » Fri Oct 30, 2009 4:20 am

Globemaster wrote:
yes, I have some on hand … why?


I just wanted to know if they were on the market and to be green with envy :twisted: lol

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Postby Rattler » Fri Oct 30, 2009 8:00 am

Thom wrote:I wonder if it has been summited for SAMMI Specs? If so the data should be available, but I can't find it.
I am curious as to the @ case diameter at the shoulder. (Already got wildcatitis on the brain). . .


Thom, yes, it has been submitted, but I do not know the process or how long it takes for SAAMI to do their thing before they release the ammo specs. The tests have been done through Hogden. Oly is waiting for the official release as well, but all the tests have been done to SAAMI satisfaction.

mikeinlouisiana wrote: I sent Hunting shack an email and asked them about brass for reloading. The responded I must contact Olympic Arms for that information.

Globemaster wrote:that’s weird … I wonder why that is?


Both Oly and HSM are sort of soft-peddeling their way through this initial release of ammunition. The reason for this is the legal agreement/restrictions that have been agreed to, in order to allow HSM to manufacture this ammo. The legal paperwork only licenses Olympic to sell the ammo, remember the law suits brought against Winchester, Browning and others by former Shooting Times writer Rick Jamison, now persona non grata in the sporting industry. Until everyone is comfortable with the agreement, and confident they are not going to get sued by Mr. Jamison, things will be a little sketchy for a while.
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Postby Globemaster » Fri Oct 30, 2009 8:40 am

Rattler wrote: it has been submitted, but I do not know the process or how long it takes for SAAMI to do their thing before they release the ammo specs. The tests have been done through Hogden.

Rattler, this must be a typo? you do you mean … the Hodgdon™ Powder Company? correct?

Rattler wrote: Oly is waiting for the official release as well, but all the tests have been done to SAAMI satisfaction.

could you please let us know the ‘SAAMI Case Data’ as soon as Olympic Arms™ receives it … thanks!
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