lower drag for varmints

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Joined: Wed Sep 24, 2008 1:19 pm

lower drag for varmints

Postby sigmatero » Wed Sep 24, 2008 1:21 pm

I’m designing a cast bullet to replace a 240 gr .30 cal BTHP for a Whisper .300. I know that most cast folks are big fans of large meplats for stopping power but I’m after low drag for varmints.

1. What is the minimum meplat that MM can make a mold for?
2. Since this is subsonic I don’t plan to use a gas check, any recommendations for the length of the base?
3. Right now I shoot Lee die .40 S&W bullets that are tumble lubed (have numerous small round bottom grooves). How would this style of lube groove work for the whisper bullet? IOW… are more shallow grooves better than fewer deeper ones and what are the tradeoffs?

Thanks folks.

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Re: lower drag for varmints

Postby mtngun » Wed Sep 24, 2008 7:10 pm

0.180" meplat.

I don't have an answer for the optimal length of a plain base.

Lee tumble lube bullets are only made by Lee. I have not seen any meaningful comparison testing done on them.

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