45 Colt in a Rifle

Dr T

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One of my spring projects is to work up some loads for a 45 Colt. Specifically, I have a 20" 460 S&W Magnum barrel for my TC Encore and I am after something a little less punishing (Something like a 2600 fps 240 gr bullet out of a 5 lb rifle gives me pause). One thing about this load is that there will be a long jump to the rifling (Something like 0.5 Inches). Any one have an idea of how this jump will effect accuracy? Or does it really matter with this rifle? Data point: The last time I shot this gun with 460's I was getting about 1 inch at 50 yards.
 
I would probably look at something like IMR4227, 2400, or one of the Magnum powders (H110/W296, AA#9, etc.) You won't know about the jump to the rifling until you give it a try....
 
I have some H110 and Lil'Gun and 100 225 gr Flex Tip seconds on hand. I have a box of factory 45 Colt flex tips for reference, but the handloads will be hotter. I also have a bunch of cast bullets to play with. I will load the Flextips with Contender/Blackhawk data and the lead at standard pressure levels (I have a Bisley and a Flat top (new model) that want to go play, too).

While the Rossi is a temptation, I already have a Marlin 1894 in 44 Mag in the safe and I really don't have the room for another lever gun in the collection. And, I already have the Encore and a virgin 6.5x55 barrel that needs to be broken in...

The work just keeps piling up. The problem with being retired is that you never get a day off...
 
That much jump to the rifling is bad, if my experience with a 30-30 Marlin 336 is applicable. Marlin reamed the chamber such that the longest I can load the round, and still eject a loaded round, the bullet has a half inch jump before it reaches rifling. That rifle is a 3-4 MOA thing with jacketed. It won't group at 100 yards with cast bullets.

I believe lead bullets are getting bent in the throat. Lead bullets are not that strong, could also be upsetting if they don't center along the way, and hit the throat at an angle.

I am curious to know what your experience will be. Let us know.
 
To avoid the lengthy .45 Colt in a .460 chamber jump, have you tried low-end .454 Casull loads in .460 cases, or use .454 Casull cases with max .45 colt loads?

Sort of like loading +P .38 Special in s .357 case for use in a .357 revolver.

Just a thought.

Stay safe.
 
The thing is that I am not sure how safe it would be to load the 460 cases light. The case is 1.8" long and the powder would likely not be evenly distributed. My approach will be to find a heavy load that will work in the Bisley (7.5" barrel) and I will get what I get in the Encore. I have another Bisley in 44 Mag with a 3.5" barrel that is a lot more accurate than I am, so I have hopes for the 45 Colt.
 
To avoid the lengthy .45 Colt in a .460 chamber jump, have you tried low-end .454 Casull loads in .460 cases, or use .454 Casull cases with max .45 colt loads?

Sort of like loading +P .38 Special in s .357 case for use in a .357 revolver.

Just a thought.

Stay safe.

That's what I was thinking, too, which is why I suggested IMR4227 and 2400. For that matter, Unique wouldn't be a bad choice if you were just wanting plinkers. Something like IMR4227 is a pretty good case filler, without being as demanding as something like H110/W296.
 
Lots of good replies here. A suggestion to the original poster: You might try loading with Trail Boss or Tin Star in .460 cases if you can find any (or have any on hand). In that size case you could probably get a hunting load worked up.

An even better idea might be black powder or Pyrodex in .460. I have an Encore, with a stainless steel barrel. Black powder cleanup is easy with that gun; I just scrub the bore with warm water with a few drops of Dawn Free dishwashing detergent. Working up a hunting load with an Encore and black powder cartidge sounds like a lot of fun! And, assuming your twist rate is fast enough, you could use 300 grain cast bullets. Sounds like a deer bomb.
 
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