Monometal load data?

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rkm456

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So for some reason I decided I'd like to load some copper solids. Both Nosler and Hornady just put their respective monos (E-tip, and GMX) in the same section of their manuals as their equally weighted lead counterparts. The issue I have is that if I load a GMX the way I would an equal weight lead bullet, well, you can't. It's a compressed load nowhere near the top of the powder scale. Anyone else run into this at all? I'm thinking I'll probably make a phone call or two tomorrow and see what they think but thought I'd ask here in case someone already has an answer.
 
I know using a 150 GMX in ‘06 I use 2 grains less H4350 than a 150gr SST for the same velocity. If your case isn’t big enough, can you seat the bullet farther out? Or switch powders to something a little faster, so less required?
 
emerson said:
I know using a 150 GMX in ‘06 I use 2 grains less H4350 than a 150gr SST for the same velocity. If your case isn’t big enough, can you seat the bullet farther out? Or switch powders to something a little faster, so less required?
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I'm a fan of H4350, because thus far I'm happy with its performance with my conventional bullets. But, yes I could potentially switch to Varget and use up a little less space. That being said, if you find that dialing back 2 grains will yield the same velocity it stands to reason that I could probably back off the load enough for the bullet to fit without hurting velocity too much.

Regarding seating the bullets farther out. I could a little, but not by much and I'm somewhat hesitant because the pressure warnings associated with monos from the manufacturers.
 
Load up a few with a couple less grains and crono and go from there. If you don’t have a crono, zero at 100 and then shoot at 200 or 300 and measure your drops to work backwards and find your velocity.
 
I load the TTSX in several rifles, and have never had to use compressed loads. Then again, like most experienced loaders, I don't load to the COL listed in a manual. As to the max loads, if you work up the loads, while watching for pressure signs, it isn't an issue.
 
Monometal bullets are longer then their equally weighted lead core counterparts, since copper is less dense then lead. Either have a long throated chamber, reduce powder charge or use a faster powder so you use less grains.
 
Another reason to use a chronograph throughout load development. Start at the starting charge from manual work towards maximum charge. When you get to the max velocity listed you’re done. And yes in my experience with the GMX I get to that velocity a couple grains before I do with cup and cores listed on same page. Nbd.

YMMV
 
monometals make more pressure, so powder charges will have to be reduced slightly from lead core jacketed data. Velocity usually is the same
 
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