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JHand
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Casting large vs small bullets
Yesterday at 9:39pm
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Before I got into schuetzen,  the only thing I really cast were pistol bullets, and 45-70 bpcr bullets. I started sorting them by weight, and ended up with a large spread, which i figured was normal. Then i got into schuetzen and cast up .32's and .28's that are much more consistent. 

Today was a "cool" California summer day (only 95 degrees!) so i fired up the 20lb Lee pot and started ladleing the lead. I cast up 100 .32's the ranged from 178.9 - 179.3, then 100 .28's that were between 152.7 - 153.2. I was plenty happy with the results,  but then moved onto 45's. I cast up 170 thet were between 531 - 533.6, which is about my normal spread on these.

Why would the spread be so much larger on the bigger bullets? I suppose i have been spoiled with my Paul Jones and John Louis molds... 

The only thought I have is that with the smaller bullets, the lead level in the pot doesn't change much, but by the time I get 80 of the 45's, the lead level is getting low, and that may affect the temp, which could affect weight?
  
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gunlaker
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Re: Casting large vs small bullets
Reply #1 - yesterday at 10:13pm
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You probably have to look at it as a percentage rather than the absolute value in tenths of grains.   

I don't see a huge difference between my 45 cal black powder bullets and my 32-40 bullets.  Today I cast 100 bullets from a Mos 32 mold and over 90 of the bullets were either 199.9 or 200.0 gr.   Normally when casting my 45 cal Buffalo Arms bullets, once they come up to weight, they will be +/- 0.2 or 0.3 gr.  So you are right, more, but as a percentage maybe about the same?

Chris.
  
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gunlaker
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Re: Casting large vs small bullets
Reply #2 - yesterday at 10:14pm
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Also I'm pretty impressed that you cast in 95 degree temps.  I'm from the west coast of Canada.  If it gets over 80 degrees I'm looking for some shade  Cheesy
  
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Dellet
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Re: Casting large vs small bullets
Reply #3 - yesterday at 10:15pm
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I think if you look at the percentage of weight variation, they will be Pretty consistent. .5%
  
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JHand
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Re: Casting large vs small bullets
Reply #4 - yesterday at 10:30pm
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gunlaker wrote yesterday at 10:14pm:
Also I'm pretty impressed that you cast in 95 degree temps.  I'm from the west coast of Canada.  If it gets over 80 degrees I'm looking for some shade  Cheesy


Gotta do what you gotta do. My stock has been running low, and i shot the last of my bpcr bullets in May, and we start again in a couple weeks. Shot the last of my schutzen bullets last month, and our match is next weekend...
  
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GT
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Re: Casting large vs small bullets
Reply #5 - Today at 9:59am
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I agree with Chris and Todd on the percentages, bigger bullets but the percentage difference is negligible.  Not sure about you, but even when I shoot and practice everyday, that half a percent weight variation isn't measurable - too many other non-tangible variables come in to play.

What I don't get, you're doing this a week in advance??? Hot or Cold, it doesn't matter.  Rarely do I have my casting done much earlier than the night before departure or the match.   I haven't taken it to the level some I know do and take the lead pot and molds with them and cast in the motel room, for that time, I have that set aside for decapping, priming, charging and if it's fixed ammo, seating the bullet... Grin Grin
Since that earlier post about how much casing is hated, I've been going to therapy and my therapist has me practicing the power of positive thinking, "keep telling yourself how much you like shooting and to continue, you love casting".
GT
  

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