Cas City Forum Hall & CAS-L
CAS TOPICS => The Powder Room - CAS reloading => Topic started by: Slamfire on September 21, 2018, 08:31:51 PM
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Just cast some ,, Lyman # 427098 ,, suppose to be at 200-205 gn's. .427 -.429 ,, moulded about 90 ,, mic'ed @ .430- .431 ,, weighed average @ .217.6 gn. Do I have to much lead and not enough antimony ,, or tin ,, bullets filled out w/ sharp edges ,,sooo,, which way do I need to go ,, up the tin ,, antimony ?? These are for a Rossi 44/40 ( 90's model ) .
smoke'm if y'a got'm ,, Hootmix .
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First I'd check the hardness, and if suitable I'd size and shoot. From what it sounds like, I think you might be a bit on the hard side with maybe too much tin or antimony.
Generally speaking, the closer to pure lead you get, the more shrinkage you get. Cast pure lead in a mold and 20-1 alloy and the pure lead casting will be smaller.
Of course, it could also be the mould itself.
Just as an aside, I don't know what velocity your planning on shooting, but I've pretty much settled on 20-1 lead/tin for just about everything, 44 colt to 45acp and 45 colt. If I was casting for magnum rounds I'd want them harder though.
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Thank you will52100 ,,that's the answer I think I'm looking for . I did the pencil test on fresh ( waited a couple hours ) cast rds. tested @ 20/1 ( B2 ) ,, but I will try adding more lead to the pot .It will be raining all day ( tomorrow ) Sat. will have time .
smoke'm if y'a got'm ,, Hootmix .
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Unless your shooting as cast, I'd just size them when lubing if it's testing at 20-1 hardness. Even if shooting as cast I'd load one and see if it'd chamber. Keep in mind, some guns may state they are what ever size, but like larger bullets. As a general rule, the larger the bullet that will still chamber and cycle the better. Most of my pistols and rifles in 45 colt prefer a .454 over a .452. My as cast 44's are .430-.431 and will shoot just fine as cast in my guns. I do have one that's a bit finicky though.
Also, of all the molds I have, not one drops the exact weight they say they do, every one is a couple grains one way or the other, but as long as it's consistent and shoots good it's not that big a deal.