Frustration with cast weight of C452-300-RF

[DEVERS454]

Ok, I know Lee is supposed to use 10:1 Pb-Sn for their alloy with a gas check.

My boolits cast from PURE LEAD are dropping at right around 294gr. With the gascheck seated, it still only 302.5gr

Using #9 magnum shot, I get 285gr before gascheck. (so, with highschool chemistry as my guide, I am getting shot that is right at 6-7% Antimony)

My Lyman #2 alloy is dropping right at 280-281, which corresponds to 90:5:5

If I use the Lee formula of 10:1, there is no way it could drop a 300gr boolit.

If folks are getting boolits that weight more than 300gr before gas checks, what the heck are you using? Depleted Uranium?

My results are the same with both 2 cavity and 6 cavity molds. I have tried this with both cool and hot mold blocks.

Should I be worried? (since everyone seems to believe actual castings with WW are much heavier)

I also tried this with laddle poured and I only lost a few grains with either alloy.

[44man]

Not to worry as long as the boolit is the right diameter for your gun. Rarely do boolits match the weight stated. If it fits and shoots good, forget the weight.

[454PB]

That is strange, my mould drops boolits of around 315 gr. using ww alloy. After seating the check and lubing they run 325 gr.

How about measuring the total length without the gas check and I'll compare that to what mine measure.

[flhroy]

DEVERS454
Mine also is right in there with 454pb's using straight wheel weights

[Bucks Owin]

Not to worry as long as the boolit is the right diameter for your gun. Rarely do boolits match the weight stated. If it fits and shoots good, forget the weight.

I agree. It's the final result, accuracy, that is important. No use sweating the small stuff...

Dennis

Actually, I'm kinda surprised when a boolit DOES end up "right on the money" as far as weight goes. I was pleasantly surprised when my 310 gr Lee .44 mould dropped boolits of EXACTLY 310 grs with the GC.....(no lube)