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crimp on 45/70 (Read 5551 times)

jlcycles Ex Member	crimp on 45/70 Apr 25^th, 2016 at 9:36pm	Print Post
	Is crimp necessary when loading for 45/70 for single shot? I'm using smokeless powder with 405 gr. Lead bullets. Thanx for any input.


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Hiwall55 Senior Forum Member Offline Posts: 468 Location: west central Illinois Joined: Jun 30^th, 2012	Re: crimp on 45/70 Reply #1 - Apr 25^th, 2016 at 9:42pm	Print Post
	My single shots work better with no crimp. What's this smokeless, must be a new Fad!


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jlcycles Ex Member	Re: crimp on 45/70 Reply #2 - Apr 25^th, 2016 at 10:07pm	Print Post
	This is my first. Trying to learn. How bout flairing the case mouth?


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Schuetzenmiester Frequent Elocutionist Offline Posts: 6707 Location: Cool Wet Side of WA Joined: Apr 27^th, 2008	Re: crimp on 45/70 Reply #3 - Apr 25^th, 2016 at 10:14pm	Print Post
	I never crimped them. Just belled the case mouth enough to get the bullet started, but not enough it would not chamber.

	"some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence
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jy3855 Senior Forum Member Offline Posts: 368 Location: California Joined: Jul 13^th, 2015	Re: crimp on 45/70 Reply #4 - Apr 25^th, 2016 at 11:03pm	Print Post
	I bell the case enough to prevent the mouth from shaving lead off of the bullet, then after seating, remove enough of the bell with the seating die in a second operation so that the cartridge chambers fully, but do not screw the die down far enough to crimp the case mouth.


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Chuckster Frequent Elocutionist Offline Posts: 2312 Location: Colorado Joined: May 15^th, 2008	Re: crimp on 45/70 Reply #5 - Apr 25^th, 2016 at 11:27pm	Print Post
	My 40-65 seems to work best with just a slight taper crimp. Enough that you cannot pull the bullet out of the case with your fingers, but can still rotate the bullet in the case. Chuck


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shovel80 Oldtimer Offline Posts: 896 Location: Sonora,CA Joined: Jun 6^th, 2011	Re: crimp on 45/70 Reply #6 - Apr 25^th, 2016 at 11:33pm	Print Post
	When shooting my .45-70...it's black powder only...I like to finger seat the bullets...I never do any sizing or crimping of the brass. Just an occasional trimming. Terry

	ASSRA Member # 11021
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UtahDave Senior Forum Member Offline Posts: 396 Location: Heber City, Utah Joined: Aug 14^th, 2010	Re: crimp on 45/70 Reply #7 - Apr 26^th, 2016 at 12:14am	Print Post
	Like Chuckster I just use a tiny bit of taper crimp. The only problem is to make sure the seating depth does not end up getting the bullet stuck in the rifling in case you have to unload the charged brass. More than once I've had to pop out a stuck bullet using a cleaning rod through the muzzle...not a good idea. Worse is when a crimped case gets stuck, then you are popping out a loaded round from the front. Dave


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Schuetzenmiester Frequent Elocutionist Offline Posts: 6707 Location: Cool Wet Side of WA Joined: Apr 27^th, 2008	Re: crimp on 45/70 Reply #8 - Apr 26^th, 2016 at 2:50am	Print Post
	I neck sized enough to have a firm grip on the bullet. I never had any bullets or ammo stuck, but then I usually shot em when I loaded it After they came out, I used a expander die sized a thou or two smaller than the bullet diameter with a starter step at the mouth. Sorry, I don't recall what they are called. I found most rifles shoot better with a little jump, .010 or .020, not with the bullet seated tight against the rifling for fixed ammo.

	"some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence
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boats Frequent Elocutionist Offline Posts: 7728 Location: Virginia Joined: Apr 23^rd, 2004	Re: crimp on 45/70 Reply #9 - Apr 26^th, 2016 at 2:41pm	Print Post
	Crimp enough to avoid problems, which will vary from rifle to rifle. Crimp too much accuracy suffers. Problems would be, Lever Actions spring pressure in the tube. Single shot hunting rifles need to be able to extract a loaded round. Carry the cartridge in a belt or pouch it ought to be tight. Used to be crimp was recommended to improve powder burn. Smokeless powder bullet does not sit on the charge like Black, often they need more neck pull to hold the bullet in place. Target gun formal match shooting less you let the case do to the bullet better off you are. Boats


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CajunRebel Oldtimer Offline Posts: 694 Location: Alexandria, VA Joined: Nov 18^th, 2007	Re: crimp on 45/70 Reply #10 - Apr 26^th, 2016 at 5:16pm	Print Post
	Hiwall55 wrote on Apr 25^th, 2016 at 9:42pm: My single shots work better with no crimp. What's this smokeless, must be a new Fad! HiWall55 - Don't worry, it'll soon go out of popularity. People just like to experiment with something new. Just like Boxer primers, non-lead bullets, little boxes and tubes to hold cartridges, etc., - fads. They probably want to shoot in the dark and hit targets over 1000yds. Dem darn yungins don't have any respect, waste money on anything. Next thing you'll know they be making firearms out of plastic.


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jlcycles Ex Member	Re: crimp on 45/70 Reply #11 - Apr 26^th, 2016 at 9:50pm	Print Post
	Thanks for the info. I adjusted my dies and seating is just fine. 2.56" places the case mouth at the top of the bearing surface.


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Wincacher Participating Member Offline Posts: 48 Location: New Mexico Joined: Feb 8^th, 2016	Re: crimp on 45/70 Reply #12 - Apr 26^th, 2016 at 11:55pm	Print Post
	I've been reloading 45-70 Government's since the mid 1970's. I never crimp when loaded for single shot firing, nor any of my other hyphenated cartridges when loaded for single shot shooting whether in a lever action or a High Wall. The purpose of the crimp is to prevent the bullet from being pushed back when loaded in a tubular magazine, or to prevent bullet movement in the remaining loaded cylinder chambers of a revolver, thus it is not necessary when not being used that way. Further, if the bullet moves easily in the case neck you are using too large a neck expander. Can't say anything about the accuracy of crimped vs. non-crimped

	Wayne
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