Originally Posted by NRALIFE
I would like to know do you crimp lead bullets?? If so tapers or rolled, and why please?? Also state cartridge/caliber..
Thanks for you input
The rounds waiting in the non-firing chambers are subjected to the recoil...the revolver does a good iminitation of an inertia bullet puller (revolver moves back in recoil, bullets want to stay still, result LOOKS like teh bullets have moved forward, but what happens is the revolver moved backwards fast enough to leave them "hanging"). IF not crimped, the bullets will end up sticking out of the front of the cylinder, tieing up rotation.
IN the loading cycle, the bullet will come into contact with the feeding ramp...ammo will be moving as fast as the bolt moves forward. IT's NOT subject to having the bullet move foreard as in a revovler, but is subject to having the bullet jammed back into the case.
Lever (and other tube fed weapons):
The rounds are suject to teh compression force of the magazine tube and the forces of recil (which kind of bounces them back and forth.
Generally not needed for functioning, but may be helpful in reducing one omre sharp edge (the case mouth) that could possibly hang up on projection. Generally don't crimp bolt gun ammo.
Some loads work better crimped. Usually that's a sign that the bullet/case fit could be tighter, and a switch to a slingly smaller expander whne reloading may be called for. Given a tight fit between bullet and case in SMOKELESS loads, seldom use a crimp for bolt guns or single shots.
On heavy recloing guns, the ammo in the magazine is subjected to "bounching" forces (inertia slams it into the front of the mag., then it bounces to the back).
WIth Black Powder it's harder to be definate..prefer not to crimp, but with softer lead alloys used in BP shooting, getting atight case/bullet fit often results in deforming the bullet and runing accuracy. OVercrimping can also ruin accuracy...just one of those cases where you have to fiddle arround and try to balance the two (case.bullet fit and crimp) until you find a "sweet spot".