Why taper crimp

I just picked up a box of Hornady grain lead cowboy bullets. This 73 tends to hang up on a case mouth that doesn't have a nice tight crimp. I'm used to having a bullet with a cannelure or crimping groove and my bullet seater die does a nice roll crimp into that but since the cowboy bullet has no groove, I'm just seating the bullet with that die and then doing a taper crimp afterward with a Lee taper crimp die.

The result is a nice smooth crimp. Since I have never used a taper crimp, am I on the right track here? I can't answer your question about taper crimping never heard of anyone taper crimping straight wall cases , but unless you are using hard cast bullets, you can roll crimp without a groove. Soft lead is very malleable and the crimp will create it's own groove. Hornady makes a special cowboy bullet seating and crimping die especially for lead bullets but they don't say if it is a roll crimp or not.

Anybody know anything about these dies? Roll crimp for pistol caliber ammo that is to be used in a revolver or rifle especially rifles with tubular magazines. Taper crimp for pistol caliber ammo that is to be used in an automatic pistol,. When you roll crimp a lead bullet that does not have a groove it just bites into the bullet a bit.

I'm always a little afraid of developing too much pressure caused by a crimp that is too tight. Gees, I though I was on to something with that taper crimp. Bad idea huh?? I have never taper crimped 44 or 45 Colt ammo, but have used this in 38sp. If it will hold the bullet in place it should work. I've been taper crimping my cowboy rounds in my rifle and pistols for more than a score now. With cowboy loads you shouldn't have to worry about developing too much pressure with a tight crimp, although you should get a cleaner burn of your powder with a tight crimp.

I use both roll and taper crimp on various cartridges but use a dial caliper to gage how much. With either a roll or taper crimp, I try to measure a few thousandths less than the case. No more than that. I also try to have a smooth transition between the lead and the brass so it doesn't hang up going into the rifle chamber. I have never experienced a buldge or split in my reloads, probably because I'm so afraid of over crimping.

That said, it's always been with roll crimps. The 6. I just ordered a Lee factory crimp die for my I would have a much faster round here and there on my magnetospeedV3 , so I figured I was getting a bullet pushed back and increasing pressure. Sure enough the crimped helped. That 1 inch high flier disappeared.

I use a. It holds enough that I don't get any bullet push back. So either will work in my experience. My rounds are working fine at. I don't intend to ever drop my ammo out of an aircraft so I don't see any need for a crimp. Same here. I find tension uniformity more important than the amount of tension. Recommended Posts. Posted February 23, Just wanted to check and make sure I'm applying my taper crimp properly.

Ran them through the tamper crimp die and they remeasured the same around 0. OAL varied from 1. Diameter remained the same 0. Link to comment Share on other sites More sharing options Steve RA Posted February 23, Looks like you need a bit more crimp. Sent from my GT-I using Tapatalk. Great tip - I'm a novice reloader as well.

Will try this tomorrow. Although my method works well for me, there are always many paths to happiness Sent from my GT-I using Tapatalk. Do they chamber in your gun? If so, there is enough "crimp. Do they mark the bullet? Is so, there is an excess "crimp. RDA Posted February 23, I'd back off on the crimp slightly based on the pics of the pulled bullet.

Try a. GJGary Posted February 23, When you said you see a shinny ring at the top, that's all you need. Posted February 24, Glad you got yourself sorted out. Now go shoot lots pf homemade ammo!

Posted February 26, One last group without the rest, unsupported 4. Hi-Power Jack Posted February 26, Great groups at 10 m.

Can't wait to see the 25 m. I don't see any signs of pressure on the primers. What velocity did you get? Find all posts by mikld. Find all threads started by mikld. Visit mikld photo album.

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Visit Rule3 photo album. Quote: Originally Posted by mikld Good pic of crimps. Find all posts by shield. Find all threads started by shield. Visit shield photo album. Find all posts by Fishslayer. Find all threads started by Fishslayer. Visit Fishslayer photo album. Quote: Originally Posted by shield Is the taper crimp indenting side of bullet 2nd diagram a problem to be avoided on 9mm, or OK if some indentation occurs?

Join Date: Feb Location: St. Paul smokey! Find all posts by johngalt. Find all threads started by johngalt. Visit johngalt photo album. Quote: Originally Posted by mikld Yep, the center pic is too much crimp. Find all posts by mrfluffy Find all threads started by mrfluffy Visit mrfluffy photo album. Troystat Member. Find all posts by Troystat.

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