change the weight of a bullet

[wayne5397]

With two mold with the same designed but drop to different weight bullet can you adjust one to drop the same as the other.

[Blammer]

how much wt difference are you talking?

[wayne5397]

2 grains.

[Morgan Astorbilt]

What weight bullet, and did you cast them both at the same time with both molds brought up to temp? A difference of 2 grains in a 200 gr. boolet(1%), can be the result of variations in lead or mold temp.
Morgan

[wayne5397]

185 swc , both at the same time.

[wayne5397]

forgot to mention one mold is H&G the other is SAECO.also the body our different both 4 cav. could one be getting hotter than the other when casting. both our #130

[Blammer]

so how much change in POI does 2 grains make for you?

I don't think it would be noticable.

[Hipshot]

Two different make molds, two different styles------one is an apple----one is an orange !!!

hipshot

[wayne5397]

went and did some testing today look like both will shoot the same. At 50 yds 3 to 4 inch group. At 25 yds mush tighter 2in and less.

[HeavyMetal]

Live with it!

[Buckshot]

Live with it!

Yup, especially with moulds from 2 outfits.

"At 25 yds much tighter 2in and less."

And less is.............? If it's a Contender, FA revolver or a built accuracy pistol, scaling boolits in match prepped brass is the way to tighten things. Otherwise it all looks pretty good to me right now.

..................Buckshot

[wayne5397]

thank you for the information.

[EDK]

IIRC, Hensley & Gibbs would match cavities weight for an additional charge on their moulds 'way back when....maybe Ballisti-cast does also.

Just for informational purposes, try running a cast with your moulds and segregating the boolits by each cavity and weight them and get some numbers. I'd guess that you will find some variation on the cavity weights on a specific mould.

If you want precisise weights, I'd use only the mould with minimal cavity variation. Building match grade ammo is something for people with a lot of time on their hands because you will be doing a lot of weighting and measuring and fine tuning!

:Fire::castmine::redneck:

[wiljen]

I've been lucky to get all the cavities in a single 4 or 6 cavity mold to weigh within one grain of each other, 2 grains between 2 molds is really pretty darned good.

[Lloyd Smale]

heck casting a 185 grain bullet i get 2 grains difference out of the same cavity. It wont hurt a thing at the ranges your using a 45acp.

[wayne5397]

thank you for the info. iam look for a 200 gr swc to see if it will perform better at 50 yds.