Hi guys just wondering what you think about crimping for a 458 lott Ruger #1 do or dont?

PROBABLY NOT NECESSARY IN A NO 1 BUT IT CERTAINLY IS IN ANYTHING ELSE

Thanks I figured as much. Do you seem to get a better powder burn with a crimp?

Yesterday I took my #1 in 458 Lott to the range to test some ammo. Had two different 300 grain bullets, one with a crimping groove and one without. Velocities were within 15 fps for the same powder charge.

I usually crimp though because the expander in my die set bells the front of the case and they won't chamber if not crimped.

Now will a 458 wm factory crimp die work on a 458 lott?

It will with the Lee crimp dies if you stick the Lott round in from the top and position it correctly.

shot the 350 tsx kick like a mule but very fun to tame no need for a crimp in a ruger #1 can't wait to try 500gr hrn with 87 gr w748 woooohhh!!!

quote:

Originally posted by 458Win:
PROBABLY NOT NECESSARY IN A NO 1 BUT IT CERTAINLY IS IN ANYTHING ELSE

+1

Maybe even in a Ruger no. 1 its best..I have seen on ocassion over the years bullets out a tad too far or they failed to completly seat it perhaps or seated the bullet shallow for some reason, whatever and when you extract a loaded round the bullet will stick in the lands and you have a powder mess and jammed up gun and perhaps no rod to get the bullet out in the field. These things should not happen but they do.

I normally grind and polish most of my reloading die expander balls and take about.002 to .004 of the expander ball to tighten up the neck and I use a 98 to 99% density powder for that given case. I do this on all single shots and double rifles for sure. Add a very ligt crimp to this..I don't crimp the bolt guns until I get to the Lott and up.

This is the way I do it, others may have a better method, but it has worked for me over the years, and I'm flexible to change it around a bit now and than, depending on how it works in the field.

thanks Ray good to know

I would say do it.

Neck tension alone can be a variable thing, depending on the particular case and the particular bullet involved.

Roll or collet crimping evens out the variables in the entire equation and creates replicable uniformity of bullet retention tension.

Say that three times fast, and crimp bloody well everything, and all will be right with your big bore banging world.

Michael,
The down side of crimping is split necks so it probably a trade off..I crimp double rifle rounds and big bore magazine rounds...Light calibers I never crimp nor have I seen a need to as neck tension is the same crimped or not crimped, at least from round to round and thats all that counts from an accuracy standpoint..

Not an arguement or even a disagreement, just some conversation on the subject.