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Thanks navy, leadman.

While I've read a lot on duplexing I've not had a reason to try it.

Smokeless powder unlike black is extremely burn rate dependent on pressure. If you fail to achieve...

Interesting data point... a 300 blk with 247 gr bullet would be about twice the sectional density though.

In 45 caliber it would be the equivalent sd of a little under 600 gr bullet weight, right?...

Thank you, navy. I appreciate the reply.

16" cmmg, carbine length.

I'm familiar with duplexing, looking for specific experience on the cartridge.

I have a bunch of wc860 (like a lot of folks) and was curious about the possibility in a heavy for caliber...

If anyone has data that shows a kind of period for group size with velocity (rpm) that would be neat.

There is a phenomenon called "roll resonance" that occurs with spin stabilized bodies in...

Anyone ever try something like this with or without a "kicker" of fast burning powder?

I'm looking for actual experience/trial.

Thanks. DrB

Yes, pmc, I did see what might be minima for group size at different spots in load development, but they were different for different powders and I think corresponded to increasing initial pressure...

Pmc, for hunting, I do like a large meplat bullet of relatively soft lead. My experience has been that I get good expansion at around 950 fps with a soft lead tin alloy and the large meplat ensures...

Pmc, I haven't done 308 win load development yet... Mostly I've been shooting 7tcu with my 308 can.

I would go with a fairly soft and untacky lube that will separate well from your bulllet at...

Conservation of momentum says lube flinging from the bullet one direction means the bullet has the opposite resultant vector of the sum of the momentum vectors of the lube bits (it goes the other...

+1 on the isotope containers (inference based on geometry).

The radiused slots down to the bottom were to get grippers onto the contents, the holes at top were for a crossbar which probably both...

Love to gear. Give me a day or two and i'll pull it together and paste it in.

Best regards,
DrB

Gear, its the linear acceleration together with twist rate that results in torque/rifling pressure, not velocity. You could have huge torques at 50fps, and no torque at 3000fps.

Rifling pressure...

Popper, I've been meaning to get around to this calc to get psi loading on the lands for a while. The outline I worked out goes:

Get max linear acceleration of bullet (should be maximum just...

Anyone ever figure out what the alloy was? :)

I think shrinkage would be in the ballpark of .982... So if your wax investment was around .360", your bullet diameter should be around .353". Might have to really crimp that in there, and dont...

I'm confused. Why wouldn't you just make a wax investment with your mold a la gloobit? If you took them a copper bullet they're not going to be able to melt that out of the mold.

I would suspect...

Thats some nice work, much more so for a prototype!

Uh, so since there aren't any werewolves to shoot, would he really notice if you conserved the silver and cast some nice silver shiny hard lead bullets? :)

+1 on the jeweler, but they will be...

Interesting. Ambient temperature, and range shot at?

A good price/deal by the looks of it. Good looking wood on the forearm.

Just got my k31 to the range today for the first time!

What a pleasant surprise! The bolt is like glass - slick, and I can't feel the difference between ejecting a fired case and loading a...

I've been enamored of the 17 AH since I first read ackleys books.... Never had one though. Honestly, I wish though they had done it on a 5.7 cartridge or such instead of the hornet if they were...

I thought the mesquite had potential of you found one with more figure, but the cumaru is very nice.

HAH! :) :groner:

Sounds reasonable to me... George Washington Carver I am sure would wonder what took us so long to start using peanuts for lube.

I wonder if I took this on a pig hunt if...