cast bullet weight tolerance question

[Lumpy Grits]

My certified 20:1 alloy casts bullets within a grain spread in the 0.458. It seams the best temp. has to be around 780* for good, filled-out, consistant wt. bullets.

YMMV

So does my 30:1.
I never keep the first 5-6 bullets even after preheating the mould.
Gary

[Smokin Guns John]

chaneylake - Bullet weights will vary for every casting session. In the beginning, they will vary a lot by weight and finish. Segregate them by your weight tolerance. My competitive tolerance is +/- 0.3g. On a session by session basis, most of your cast bullets will have a weight consistency where only a few are too light or heavy to meet your precision shooting goals. Those few go back into the cook pot for the next session. Try to develop a consistent casting process so that you dip, pour, cut the sprue and drop the bullet that same way every time. Consistency begets consistency.

Good shooting!

[Lumpy Grits]

"Bullet weights will vary for every casting session."
They shouldn't, IF you got the 'routine' correct ........
Gary

[Semtav]

I'm a big believer in sorting bullets to weight. So I usually end up with a few extras that don't fit the groups plus some with the swirleys on the nose if I started casting too soon.
Last month I gathered up about 60 of those bullets, lubed them and stuck them in my 40-82 cases to get rid of at the local Buffalo match. 300 to 650 yds. As luck would have it, the match got cancelled and I didn't feel like pulling the bullets so I just shot them at the long range match. I wound up right up in the running and most of my misses were of my doings, not the bullet. I'm probably not going to throw as many bullets in the recast bin as I used to.

[chaneylake]

I'm a big believer in sorting bullets to weight. So I usually end up with a few extras that don't fit the groups plus some with the swirleys on the nose if I started casting too soon.
Last month I gathered up about 60 of those bullets, lubed them and stuck them in my 40-82 cases to get rid of at the local Buffalo match. 300 to 650 yds. As luck would have it, the match got cancelled and I didn't feel like pulling the bullets so I just shot them at the long range match. I wound up right up in the running and most of my misses were of my doings, not the bullet. I'm probably not going to throw as many bullets in the recast bin as I used to.

as I progress into this game I am starting to see the same, just starting into my 3rd year, I am just trying to avoid any element that will be negative as I learn, I am trying to keep all cast bullets within 0.3 grains +/- and I fully expect to reach this point regardless of how many I throw back into the pot