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cast bullet weight tolerance question - chaneylake - 12-26-2012
I started back casting bullets today, Paul Jones .40 cal mold, certified lead 30:1, casting temp 750, using pot and pouring with ladle.
weights ranged from 421.1 grains to 422.6 grains, with the bulk weighing 421.9 - 422.0
this is only my third year of casting
all bullets appear excellent to my 62 yo eyes
Is this to much of a weight spread?
RE: cast bullet weight tolerance question - powderburner - 12-26-2012
looks like you started a little cool and got in a little bit of a hurry , but they will all shoot good if they dont have defects, I would sort them a little closer. put them in lots and go shoot them , or you can throw the ends back and do it again, but before you do take a sample from both ends and shoot them. you may be pleasantly surprised.
RE: cast bullet weight tolerance question - chaneylake - 12-26-2012
is maintaining 750 degrees to cool?
RE: cast bullet weight tolerance question - powderburner - 12-26-2012
nope , just about right ,, I meant the mould wasn't quite up to temp when you started, and when you were casting the heavier ones your cadence speeded up a little ,it sounds like though that you have it mostly in hand ,,, you do not say how many on the low end and how many on the high, at 421 .9 and 422 you were pouring smooth and maintaining an even mould temp.You get variances no matter how you do it other than weigh each one as it is dropped and reject all that are not to your spec,
RE: cast bullet weight tolerance question - chaneylake - 12-26-2012
(12-26-2012, 09:37 PM)powderburner Wrote: nope , just about right ,, I meant the mould wasn't quite up to temp when you started, and when you were casting the heavier ones your cadence speeded up a little ,it sounds like though that you have it mostly in hand ,,, you do not say how many on the low end and how many on the high, at 421 .9 and 422 you were pouring smooth and maintaining an even mould temp.You get variances no matter how you do it other than weigh each one as it is dropped and reject all that are not to your spec,
ok, I fully understand, over the next month I feel that I will be into the proper cadence, just sorta like trigger time
RE: cast bullet weight tolerance question - powderburner - 12-27-2012
exactly , practice makes perfect , I try and make a 45 cal bullet in the 550 range anout 1 every 45 seconds , when I am there they come out very close when I deviate so do my weights,
RE: cast bullet weight tolerance question - chaneylake - 12-27-2012
cast 80 this morning, 75 were 421.9 - 422.2, I am on a mental count of 55 for each cast, which is probably about 45-50 seconds in real time
RE: cast bullet weight tolerance question - Kurt - 12-27-2012
If your holding 3/10 grain variances for 75 your doing better then the average caster.
Now just dont sit there and look at them, shoot them!!!
Happy New Year to y'all here.
Kurt
RE: cast bullet weight tolerance question - chaneylake - 12-27-2012
(12-27-2012, 05:34 PM)Kurt Wrote: If your holding 3/10 grain variances for 75 your doing better then the average caster.
Now just dont sit there and look at them, shoot them!!!
Happy New Year to y'all here.
Kurt
do not worry Kurt, I sent about 1200 down range last year, planning on 2500-3000 this year.
no duck season worth a hoot in west Tenn due to drought, might as well cast bullets on cold days
RE: cast bullet weight tolerance question - Old Jim - 12-27-2012
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