Too much crimp?

[RiskyBusiness]

I've read the LFC die is limited to over crimping but had a fellow reloader tell me i just made home made pipe bombs with the amount of crimp i applied to these bullets, that the pressure would be too high. With this crimp im at .471" which is where i want to be correct (.468-.471)?

these are pc, sized to 452 and i had to seat deep enough so that they would both chamber and exit freely back out of the barrel. Seating depths are 1.135. 1.135 and 1.195 for the 230gr TC

[EMR]

[RiskyBusiness]

dont have a mic but i'll go ahead and pull them and back off the crimp a few thousandths. Also will measure the diameter

[Carcassonne]

It is a little too much, but they will work, and it isn't dangerous.

You shouldn't need to turn the knob more than 1 turn from when the die touched the edge of the brass. I usually use 1/2 to 3/4 turn for regular pistol ammo. I used 1 turn for some 454 Cassul, 41 mag, 357 mag, and 44 mag loads.

I think Lee rifle FCD's need to have 1 turn, but I cannot remember.


.

[PatC415]

dont have a mic

You reload and don't have a mic?:

[RiskyBusiness]

You reload and don't have a mic?:

i see that as an expensive tool that would really only benefit precision rifle shooters. but im only a few months into reloading so i could be wrong

[jcourson]

i see that as an expensive tool that would really only benefit precision rifle shooters. but im only a few months into reloading so i could be wrong

Micrometer calipers. Though there are a number of tools that register micrometers (0.001" or .01mm), calipers are almost always what we are referring to in here.

[PatC415]

$13.99. A cheap investment.

https://www.amazon.com/Flexzion-Digital-Caliper-Electronic-Micrometer/dp/B01568JY8O/ref=sr_1_2?ie=UTF8&qid=1510183975&sr=8-2&keywords=micrometer+calipers+hornady

[Mayor McRifle]

Will they chamber properly with less crimp? Preventing setback and allowing the rounds to chamber are really what you need to be concerned about, not hitting a published measurement.

[mjmagee67]

No not for a magnum revolver, for a 45 acp.............well.

[RiskyBusiness]

$13.99. A cheap investment.
https://www.amazon.com/Flexzion-Digi...lipers+hornady

ahh i misunderstood, i do have a caliper i thought you meant those expensive RCBS precision mics.

[RiskyBusiness]

Will they chamber properly with less crimp? Preventing setback and allowing the rounds to chamber are really what you need to be concerned about, not hitting a published measurement.

Update: was able to chamber the 200gr swc up to 1.240", loosened the crimp die all the way up until i can feel the case mouth. This allowed just enough crimp to leave me at .472 and after pulling that bullet there was barely a hairline resemblence of the crimp which left the bullets diameter at .451". The base how ever dropped from .452 to .450. Is this because the case is not sized properly that its choking the bullet too much? or not enough of a flare? I have the ram all the way up with the shell touching the powder through expanding die, and can fairly seat a bullet by hand just enough to get the base in.

[wbunning]

I think Lee rifle FCD's need to have 1 turn, but I cannot remember.

.

Screw the die body in until the crimp shoulder contacts the case mouth (sometimes a nebulous adjustment). Then ONE-HALF turn to provide a strong crimp.

[RiskyBusiness]

Screw the die body in until the crimp shoulder contacts the case mouth (sometimes a nebulous adjustment). Then ONE-HALF turn to provide a strong crimp.

just tested a few more test cartridges and found the LFC die is cutting my bullets 452 diameter to 450. I'll try again after i reset the die properly.

[PatC415]

Use wbunning method above your last post, to set die.
Don't worry about the base measurement. Use the above method for setting your die. You should be at .469 to.471 at the mouth. You should be OK at .472. Do a PLUNK TEST:https://www.youtube.com/watch?v=s80P2j02YnM to see if the round drops easily into the barrel, if not, slightly tighten up.
Really all you want to do is straighten out the bell in the case mouth. Have the flare set just enough to accept the base of the bullet, and you should be good to go.