OAL for Tumble Lube bullet [Archive] - Glock Talk

PDA

View Full Version : OAL for Tumble Lube bullet


dradave
12-20-2011, 11:45
Friends, I just purchased a .32 Cal Tumble Lube Lee mold TL314-90-SWC for my Taurus .327 Magnum pistol. I'm shooting .32 H&R Magnum through it right now as it's a good round for my wife. The mold drops boolits at .316 @ 91-93 gns so it should be a good fit. I have a question pertaining to crimping this round. When I am shooting Hornady HP out of it with a cannelure, the roll crimp works fine, however, with the tumble lube bands, I'm curious about the OAL and whether I should use a roll crimp or a taper crimp. I can set the OAL where it would fit one of the spaces between the lube bands or I can set the OAL where a taper crimp would work on one of the bands itself. I am curious on what my best option would be.

If a roll crimp would be the best answer, I'm looking at the Redding Profile crimp for this round. Right now I'm using the Lee FCD but I do not won't to use it with lead bullets. If a taper crimp would be best, the Redding taper crimp die would be my choice.

These rounds are loaded at the low end of the range so bullet set back should not be a problem.

Thoughts and suggestions are appreciated.

Merry Christmas...

GioaJack
12-20-2011, 12:05
OAL for a revolver, (long OAL, not short which may raise pressure), is really determined by one thing; don't load so long that the bullet protrudes past the cylinder face. That's it in a nut shell.

With very few exceptions crimping into the cannelure will work just fine.

There's no need to buy a new crimping die for your tumble lube bullets, your current roll crimp die will produce a perfectly acceptable taper crimp when adjusted correctly... it is basically the first step the die performs whem producing a roll crimp.

I'm not very familiar with the design of tumble lube bullets but if the have a series of quasi-driving bands simply choose a groove between two of them that will conform with your chosen OAL and crimp there.

If the design does not incorporate driving bands simply taper crimp at the point of your OAL.


Jack