rifle primers in .44 magnum carbine ?

[Longwalker]

I'm working up loads for a Rossi M92 .44 magnum 16" stainless trapper carbine that I carry for security while fishing and hiking near salmon streams in BC. With a near max load of 22 grains of W296 behind a Hornady 265gr. jacketed bullet, and CCI LP mag primer, function, velocity, and accuracy are all OK. Pressure seems OK too, extraction OK, with reasonably rounded primer edges, but I notice that a small part of the edge of the primer extrudes into the ejector slot. No pierced/leaking primers so far, but I don't like it.
I am wondering if substituting the harder / thicker cup large rifle primers would be a good way to eliminate this concern. I realize that large pistol primers are a tiny bit shallower than rifle primers. Rifle primers do not seem to protrude below flush in my .44 mag Starline cases. I have used small rifle primers in my Rossi 92 .357 magnum before with no problems, so adequate firing pin force is not an issue with the harder primer cups. Your thoughts?

 

[j_06]

Everyone I have leaves the same mark. Don't think you can get around that. Looks ugly but it I never paid anybother as it leaves that mark in my lightest load of 7gr of unique under 240gr cast, home brew shotshell loads or full house 296 loads.

 

[Longwalker]

Thanks j_06 I also found more info, on the Cast Bolts website:

"Well the problem with the marks on the primer is the fact that the ejector is machined into the bolt face almost half way across the case head. The ejector is supported by a spring which needless to say is far more flexible than a solid piece of steel. When firing the pressure exerted on the primer overcomes the force of the ejector and causes it to extrude back into the ejector, which for these purposes is unsupported. Simply put, the ejector spring compresses and allows the primer to flow back slightly.

All that sound really bad, but in actuality it's really only a problem if your concerned about the look of your fired brass."

end of concern.

 

[denydart]

If you were only using the gun for plinking etc. I would say go for it - provided you go through the whole process of building up a safe load with the new primers. But if you are using it for safety / protection I would stick with what you know will work 100% even if there seems to be enough pin spring pressure to use rifle primers.

 

[Suther]

correct me if I am wrong, but your primers are flowing a bit, but nothing else is effected? Function is good, and the brass itself doesn't get buggered up at all?

If thats the case, I wouldn't worry about it.

 

[legi0n]

you can use small rifle primers but you need to develop your loads over again.
I would recommend federal 205 small rifle primers.
They are thicker than the magnum pistol primers but thinner than the rifle magnum ones.