25 WSSM Case Splitting

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25 WSSM Case Splitting

Postby jw01 » Sun Jan 26, 2014 3:48 pm

I own two OA 25 WSSMs, one target rig and one "Game Stalker". My problem is the cases, either reloads in virgin brass or factory, yield about a 10% split cases. Took the uppers back to OA and had them check the chambers and both were in spec. Several people have indicated that I should anneal all my brass, fired or not. I reload lots of ammo but have never had to anneal my brass. Anyone else have this issue or have any suggestions? Both weapons are exceptionally accurate, but I can not afford the case loss rate, when you can not buy the brass. :(


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Re: 25 WSSM Case Splitting

Postby Globemaster » Sun Jan 26, 2014 4:47 pm

jw01 wrote: I own two OA 25 WSSMs, one target rig and one "Game Stalker".

nice, welcome to OA2.org … I have (2) as well, one is a Dtech creation, and the other is a limited custom carbon fiber wrapped barrel unit; both are bull-barrel.

jw01 wrote: My problem is the cases, either reloads in virgin brass or factory, yield about a 10% split cases.

my brass is Winchester brand®, and I’ve never shot factory ammunition on either of them …

jw01 wrote: Took the uppers back to OA and had them check the chambers and both were in spec. Several people have indicated that I should anneal all my brass, fired or not.

I’d anneal my brass if I had the means to do so …

jw01 wrote: I reload lots of ammo but have never had to anneal my brass. Anyone else have this issue or have any suggestions?

over that past several years, I’m probably had two pieces of brass fail in this similar manor … but attributed it to the brass, as I’m split a few during my loading and re-loading process.

jw01 wrote: Both weapons are exceptionally accurate, but I cannot afford the case loss rate, when you cannot buy the brass. :(

I hear that, as the 25WSSM brass is only manufactured and sold in limited quantities




carbon fiber barrel

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brass and loading

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I get more dings in the brass, thank I do splitting

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Re: 25 WSSM Case Splitting

Postby Globemaster » Sun Jan 26, 2014 5:01 pm

I got 2 re-loads outta this piece of brass; it may have originally split during sizing process, as I have a few others that look like possible candidates

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Re: 25 WSSM Case Splitting

Postby jw01 » Sun Jan 26, 2014 6:07 pm

I was lucky. Two years ago I ran into a deal for 550 pieces of Winchester brass. So I have some stock, just want to make the most of it. Looking at annealing machines on line are a bit spendy, but the handheld (ie cheap methods) seem to have spotty if not dangerous results. Have a bad feeling that 500 bucks or so is headed to buy one if there is not another reasonable alternative. Found a couple of places that will do the annealing for you but they start at $100 (for 500 cases) plus shipping both ways. If this needs to be done every few firings due to the high pressures that 25 WSSM works at, then buying a machine is sadly the way to go. Just makes this dream machine more costly to run.

Cool looking rig with the barrel coating. My target rig is being fitted with a S&B 3x20 and Magpul Adjustable Stock. Look forward to shooting it if I can resolve the case splitting problem.

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Re: 25 WSSM Case Splitting

Postby Globemaster » Sun Jan 26, 2014 7:07 pm

jw01 wrote: I was lucky. Two years ago I ran into a deal for 550 pieces of Winchester brass. So I have some stock, just want to make the most of it.

nice ... I stocked up over five years ago too; and have about 500 pieces in NIB brass, and a bunch of other rounds already loaded.

jw01 wrote: Looking at annealing machines on line are a bit spendy, but the handheld (ie cheap methods) seem to have spotty if not dangerous results. Have a bad feeling that 500 bucks or so is headed to buy one if there is not another reasonable alternative. Found a couple of places that will do the annealing for you but they start at $100 (for 500 cases) plus shipping both ways. If this needs to be done every few firings due to the high pressures that 25 WSSM works at, then buying a machine is sadly the way to go. Just makes this dream machine more costly to run.

I've never shopped for a machine; maybe I'll look around for a used unit.

jw01 wrote: Cool looking rig with the barrel coating. My target rig is being fitted with a S&B 3x20 and Magpul Adjustable Stock. Look forward to shooting it if I can resolve the case splitting problem.

thanks, and the build sounds nice; my other unit is built on a Magpul PRS
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Re: 25 WSSM Case Splitting

Postby Globemaster » Mon Jan 27, 2014 3:14 pm

all in all ... this is still my favorite round for Deer

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Re: 25 WSSM Case Splitting

Postby lilquiz » Tue Jan 28, 2014 4:09 am

Annealing brass is not hard to do. All you need is a propane or map gas torch, and a pan of water. I hold the brass at the webbing rotate the neck in the flame until too hot to hold. Then drop the brass in the water. Do not wear gloves, as this can lead to overheating the brass. Count in seconds how long torch time is. That way you can drop the brass after the count, so your fingers do not suffer. Around 6 or 7 seconds if i recall.
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