The M92 is a hell of a lot lighter and handier than any .45-70. 300grn jacketed bullets at 2100fps are also easily done. I'd say the OP knows exactly what he wants.
Can a Rossi M92 lever gun in 45 colt be rechambered to 454 Casull?
- Thread starter sgt.rock
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The M92 is a hell of a lot lighter and handier than any .45-70. 300grn jacketed bullets at 2100fps are also easily done. I'd say the OP knows exactly what he wants.
Iron Sighted
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2100 fps from a 16" barreled action with a 300gr jacketed bullet? Damn, that's fast. Looks like I have quite a safety margin still at 1500 fps. What powder are you using to get those velocities? I have been playing with H110 and the 300gr XTP's, any other powder or jacketed bullets you'd recommend?
20" sorry, i think the 16" is just barely under 2000. That's with factory Hornady ammo. You can duplicate it with the following
32grns H110
1.745" OAL
Rem 7.5
Starline or Hornady brass
I put a very heavy crimp on them as I also use them in a Ruger SRH Toklat.
I agree, the 92 is much lighter. The 454 offers increased performance by greatly increased pressure, whereas the 45-70 at low pressure eclipses it handily with much heavier bullets. I like lower pressure, but that's just me.
More important is the chamber specs, colt chambers being oversized, case life is reduced with high pressure loads. Reaming to 454 will not solve that.
Cheers,
Stomp
SAMMI specs. The 45 colt is spec'd at .480" but most rifle/carbine chambers are larger than that. Brass is approximately .475"
Ruger revolver chambers in 45colt are much tighter, so higher pressure loads are no problem. I've seen large chambers on rossi, winchester, and browning 45 colts. Some are grossly oversize, and some are less so, but none have been cut to fit modern brass properly. If, by some twist of fate, the OP's colt has a tight chamber, then this problem is moot, but I haven't seen a tight chambered 45 colt (long gun) yet, except the one I chambered myself with a custom made reamer.
Stomp
45 Colt case Length - 1.285", 454 Casull case length - 1.383"
Will your rifle feed, chamber and eject a 45 Colt dummy round with an OAL of 1.800"? You'll need a bullet 300 gr or heavier to have the length needed for the bullet to be gripped sufficiently by the neck.
If so, you've essentially got a 454 Casull with a short neck.
Will your rifle feed, chamber and eject a 45 Colt dummy round with an OAL of 1.800"? You'll need a bullet 300 gr or heavier to have the length needed for the bullet to be gripped sufficiently by the neck.
If so, you've essentially got a 454 Casull with a short neck.
I'm sure he was asking about a proper modification. There would be no need to load short.
.45 Colt should space on the rim not the neck, so its brass with a bullet seated to .454 Casull overall length might be a test whether .454 will fit, though a proper .454 dummy round would be a better check.
Longer magnum rounds, both here and with .38/.357, are an opportunity for newer guns that don't want the extra pressure to refuse to chamber the longer round, but there's no guarantee of this feature, most especially in older pre-magnum designs.
There is some pre-.454 tradition of people loading rather toasty hot .45 rounds, but whether you're skating onto excessively thin ice there is an unknown until you blow up a gun. Me, I stick with what the gun says it can handle and get a bigger gun if I want more.
(Likewise, note that seating bullets to other than the proper OAL will do interesting things to the pressure curve and may not lead to a good day at the range.)
Longer magnum rounds, both here and with .38/.357, are an opportunity for newer guns that don't want the extra pressure to refuse to chamber the longer round, but there's no guarantee of this feature, most especially in older pre-magnum designs.
There is some pre-.454 tradition of people loading rather toasty hot .45 rounds, but whether you're skating onto excessively thin ice there is an unknown until you blow up a gun. Me, I stick with what the gun says it can handle and get a bigger gun if I want more.
(Likewise, note that seating bullets to other than the proper OAL will do interesting things to the pressure curve and may not lead to a good day at the range.)
