This section is for reloading and ammunition only, all loads found in here are used strictly at your own risk, if in doubt ask again.
All handloading data posted on Full-Bore UK from 23/2/2021 must reference the published pressure tested data it was sourced from, posts without such verification will be removed.
Any existing data without such a reference should treated as suspect and not used.
Forum rules
All handloading data posted on Full-Bore UK from 23/2/2021 must reference the published pressure tested data it was sourced from, posts without such verification will be removed.
Any existing data without such a reference should be treated as suspect and not used.
Use reloading information posted here at your own risk. This forum (http://www.full-bore.co.uk) is not responsible for any property damage or personal injury as a consequence of using reloading data posted here, the information is individual members findings and observations only. Always verify the load data and be absolutely sure your firearm can handle the load, especially older ones. If in doubt start low and work your way up.
lasbrisas wrote:
Interesting about .30 carbine as I have this as well and have never crimped, in fact I'm sure when I first started out with this cal I read or heard that it's not supposed to be crimped. I use lee dies and load lead and jacketed bullets and never had a problem in my M1 Carbine.
That's a good observation and I should clarify as little. When using the round on outdoor shoots using FMJ's I find the tension is just fine and these rounds are not crimped, however for indoor gallery shooting where FMJ's are not permitted I use lead bullets and the rounds are magazine feed in an AR15 rifle. With these rounds I find the neck tension is insufficient and it is possible to force the bullet deeper into the shell when a little pressure is applied. I therefore apply a small amount of crimp using a separate 30 carbine crimp die to ensure the bullet is not forced deeper into the shell during the loading sequence and thus preventing an over pressure situation.
As you probably know the 30 Carbine round is headspaced off the length of the cartridge so too much crimp and the round will not camber correctly, so I set the die up to just just pinch the neck a little and provide enough tension. I do this for peace of mind and to date I haven't had any issues and I been using this method for the past 8 years, however like I stated before, the reloader needs to evaluate their own home loads and make sure they are fit for purpose.
Blu wrote:I personally don't crimp and I reload for three AR 15's, two semi auto and one of them a select fire. I do however have my dies set up for good neck tension. To date I have never had a problem and all three have had a shed full of rounds through them.
But this is probably set by a taper crimp in itself.
I think people get confused by the roll crimp that you see commonly on a pistol cartridge running into a cannular on the bullet and the taper crimp that some dies have in the seating die and others have as a separate operation.
No I don't crimp at all. I do know the difference between roll and taper crimps as I load for both revolver and semi auto pistols as well as my rifles. I do not have my seating die for my AR's set to crimp because as I stated earlier I have my sizing die set for proper neck tension.
If I did crimp for my AR's then it would be a taper crimp as the bullets I use do not have a cannelure
In the early 1980s. a guy in the north of England was shooting a New Service Colt in .455. He was impressed with his loads and invited a friend to try it. The friend fired a couple of shots and found the cylinder had jammed due to the recoil pulling the bullets. He pushed the offending bullet back with his finger and fired it. The cylinder exploded and a piece of it killed its owner----he probably didn't believe in crimp.
I can't find the web page now, but about two weeks ago there was a story, complete with pictures, about a 45-70 which had blown up because the bullet had been pushed back into the case when feeding.
The only rounds that I crimp are 44-40 for my '92 Winchester. I don't crimp the rounds for my 71 / 84 Mauser because the case is full with lightly compressed black powder.
Fred
He pushed the offending bullet back with his finger and fired it. The cylinder exploded and a piece of it killed its owner----he probably didn't believe in crimp.
Well Fred if he didn't believe in crimp for pistol rounds I'm not surprised this happened. I said I don't crimp my AR rounds, didn't say I didn't crimp my pistol rounds. I do.