My test started on 3-27-10 on 44mag bullets shows they are not getting larger in diameter. Made from magnum shot/6% antimony, then oven heat treated for 1 hr. @ about 450 degrees, just below slump, then water cooled. Adjust your taper crimp die, you may need more crimp for that Gold Cup.
The most likely reason is using mixed cases. Different brands have different wall and web thicknesses. I have several years of 45 ACP's loaded most of the time and never had any expand while ageing in an ammo can.
Dave C.
Distinguished, Master,2600 club, President 100 badge holder.
I've seen evidence of 'growing', with boolits that someone had cast HARD quite some time before we shot them.
http://www.castboolits.gunloads.com/...ad.php?t=57732
Sorry to say I missed today's match due to putting a new wheel bearing on the car. Really needed to get it done before the temp started plunging towards a low in the teens tonight.
Bismuth alloys grow bigger in diameter. http://www.alchemycastings.com/lead-...ts/fusible.htm
Last edited by 243winxb; 12-12-2010 at 10:08 AM. Reason: added link
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