Neck down crimp lowdown

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AJC1

AJC1

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Another crap day outside so YouTube is again showing me all the wonder of things I never knew. What's with this neck down crimp and do I need it in my life. Found in dies prior to 1984 one would guess it's not the best way forward but who am I to make such assumptions???
 
So, if I watched that correctly, you need dies that are 1984 or older?? We gotta give up YouTube.

Shoot, now I need to read Speer again.

I guess if you're shooting at up to 65,000 psi, you'll try any crimp you can get to hold? Elmer Keith would be plumb proud. Not a lot out there on this that I can find.
A-photo-of-44-Magnum-454-Casull-and-460-SW-Magnum.jpg
 
Well, there's no doubt those rounds have been crimped. The only pistol I've ever loaded is 9mm. Sometimes its hard to tell when those cute little things have been crimped which is probably the most correct.
 
Well there is no doubt he is "necking down" the mouth of the case into the bullets.

I've loaded a whole bunch of magnum rounds on the wild side as well as a whole bunch of 454 rounds. In most cases I use just enough of a roll crimp to hold the bullets in place after 6-10 shots from my revolvers.

I'm thinking those shown are a bit overkill, IMO.
 
Video 10 min in., He said "1 time case" Meaning after 1 crimp, brass is scrap to him.

I did a test with 44 mag using my 1973 RCBS crimp/seat die. A 1/4 turn made my normal crimp. At 3/4 turn i was near maximum crimp.
At 1 full turn RCBS press cammed over with very heavy pressure. Not good. 20210228_085110.jpg 20210228_084849.jpg 20210228_093801.jpg


Mostly, Neck tension keeps bullets from jumping crimp.
 
Last edited:
243winxb said:
Video 10 min in., He said "1 time case" Meaning after 1 crimp, brass is scrap to him.

I did a test with 44 mag using my 1973 RCBS crimp/seat die. A 1/4 turn made my normal crimp. At 3/4 turn i was near maximum crimp.
At 1 full turn RCBS press cammed over with very heavy pressure. Not good. View attachment 981186 View attachment 981187 View attachment 981197


Mostly, Neck tension keeps bullets from jumping crimp.
Click to expand...
I almost never crimp. Take the flair out of 9 and 45 and done. I do crimp 357 and 45 and 45/70 but those go in a tube. Rifle not at all.
 
Man that’s some serious crimp, and it’s gotta be hard on the brass. He will probably be lucky to get 2 loading out of that brass. I don’t see the point of that much crimp, either he is loading them way hard and should step up a caliber, or he couldn’t get god neck tension and someone said this is how we did it back then and he fell for it.
 
You could get the same crimp using a non carbide sizing die with the decapping rod removed IMO. But why do it??? Waiting for an accuracy test over a standard type crimp LOL.
 
I wish I had a nickel for every .357 and .44 I've loaded. If I'm loading hot, I'll roll crimp these babies, if not, then not so much.

I don't have a .454 C and would be interested in hearing from those that do. Roll crimp working?
 
A "neck down crimp" is news to me too (after 40+ years reloading). The pics look like a heavy collet crimp (too heavy). The heaviest bullets over a heaviest charge for me was a 300 gr.RNFP over a max. load of WC820 and a plain, old fashioned roll crimp worked quite well in my 44 Magnum revolvers.

I don't normally watch any youtube videos on reloading or bullet casting, but the other day I was bored and checking something out in google and was sent to a youtube video. I was quickly reminded what crap is posted. One I watched was a "mouth breather" that punctuated read other word with a "uhhh", and sounded like he needed to blow his nose. One video started out with some inbred moron yelling "Hey youtube fellers". Most just said Hey Youtube, what's happenin'?". I was thinking "I wonder how many new reloaders are believing this junk?". Yes I know there are some decent, informative videos but a new reloader hasn't developed his "BS Filter" enough to separate the good from the bad. I maintain my suggestion for any reloader to take youtube videos with a grain of Bullseye and carefully review/analyze it all...
 
mdi said:
A "neck down crimp" is news to me too (after 40+ years reloading). The pics look like a heavy collet crimp (too heavy). The heaviest bullets over a heaviest charge for me was a 300 gr.RNFP over a max. load of WC820 and a plain, old fashioned roll crimp worked quite well in my 44 Magnum revolvers.

I don't normally watch any youtube videos on reloading or bullet casting, but the other day I was bored and checking something out in google and was sent to a youtube video. I was quickly reminded what crap is posted. One I watched was a "mouth breather" that punctuated read other word with a "uhhh", and sounded like he needed to blow his nose. One video started out with some inbred moron yelling "Hey youtube fellers". Most just said Hey Youtube, what's happenin'?". I was thinking "I wonder how many new reloaders are believing this junk?". Yes I know there are some decent, informative videos but a new reloader hasn't developed his "BS Filter" enough to separate the good from the bad. I maintain my suggestion for any reloader to take youtube videos with a grain of Bullseye and carefully review/analyze it all...
Click to expand...
Ha ha sounds like you watched a loads of bacon video. He is hard for me to watch. I'm way more a gunblue490 or jonnysreloadingbench kinda guy.
 
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