MoP_GBB
09-23-2020, 01:31 PM
Long time lurker, have been casting for a few years, but in relation to the experience level of most of ya'll ... I'm a noob. With that said ...
Picked up a Lee 310 gr, 6 cavity .430 mold. Used Lyman #2 straight from Rotometals. Poured at what my RCBS thermo said was 700'ish.
Here is the data:
n=73 (projectiles)
Mean weight in grains: 288.2
Heaviest projectile: 290.7
Lightest projectile: 285.9
Hi Lo Range of: 4.8 grains (variance)
a 310 grain mold throwing casts 21.8 gr's light on average seems to be a problem, no?
These same projectiles, gas checked and lubed (pan lubed):
Mean weight in grains: 296.8
Heaviest projectile: 299.2
Lightest projectile: 294.2
Hi Lo Range of: 5 grains (variance)
Love to hear your thoughts and guidance. Until proven differently, I'm under the belief that this is way more likely something I did, than a problem with the tools.
Picked up a Lee 310 gr, 6 cavity .430 mold. Used Lyman #2 straight from Rotometals. Poured at what my RCBS thermo said was 700'ish.
Here is the data:
n=73 (projectiles)
Mean weight in grains: 288.2
Heaviest projectile: 290.7
Lightest projectile: 285.9
Hi Lo Range of: 4.8 grains (variance)
a 310 grain mold throwing casts 21.8 gr's light on average seems to be a problem, no?
These same projectiles, gas checked and lubed (pan lubed):
Mean weight in grains: 296.8
Heaviest projectile: 299.2
Lightest projectile: 294.2
Hi Lo Range of: 5 grains (variance)
Love to hear your thoughts and guidance. Until proven differently, I'm under the belief that this is way more likely something I did, than a problem with the tools.