.300 win mag 26" barrel hornady 208g

S

sailnaked

Private
Minuteman
Nov 7, 2024
5
5
houston tx
#1
was talking to another reloader and he mentioned that some people add a few grains of fast powder at the bottom of their load to help ignition. It got me thinking about putting some fast powder at the top of the load to give the bullet some extra kick as it is traveling down the barrel. I have a 26" barrel so seems like a good idea, and if it does not blow up the gun on the first shot Ill let yall know next week. any experience out there with this idea? I cant be the first, any proportion advice? my test loads have 60g Imr 4895 and 12g of 3031 on top. (full case). if I still have fingers on monday I plan to use 4350 and 3031 unfortunately I do not have a chronometer yet,
any useful advice is welcome,
 
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#2
STUPID IDEA ABOVE, and dangerous. DON'T

Load 74-77 ish grains H1000 over a CCI250 or Fed 215 .030-.060 jump, or whatever your magazine will allow. Have shot hundreds, maybe thousands of 300WM rounds and 7mm RM, have NEVER had an ignition problem in temps from teens to mid 70s
 
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#4
Your idea is unsafe and ridiculous.
You want more speed?
Get a longer barrel or a bigger cartridge. Or both.

Forget duplexing powders. You don't have enough knowledge or experience to be screwing around like that.

If you decide to pursue this, don't shoot within 30' of any other people.
 
#5
Mike Casselton said:
Your idea is unsafe and ridiculous.
You want more speed?
Get a longer barrel or a bigger cartridge. Or both.

Forget duplexing powders. You don't have enough knowledge or experience to be screwing around like that.

If you decide to pursue this, don't shoot within 100' of any other people.
Click to expand...


fixed it for you. Not really sure on a detonation how far chunks of steel/flesh will fly, or what the kill zone is.
 
#6
sailnaked said:
was talking to another reloader and he mentioned that some people add a few grains of fast powder at the bottom of their load to help ignition. It got me thinking about putting some fast powder at the top of the load to give the bullet some extra kick as it is traveling down the barrel. I have a 26" barrel so seems like a good idea, and if it does not blow up the gun on the first shot Ill let yall know next week. any experience out there with this idea? I cant be the first, any proportion advice? my test loads have 60g Imr 4895 and 12g of 3031 on top. (full case). if I still have fingers on monday I plan to use 4350 and 3031 unfortunately I do not have a chronometer yet,
any useful advice is welcome,
Click to expand...


Some people also have unprotected sex with ghetto hookers...I'd probably consider that safer than what you're about to do.

My advice is "no". No to all of it. I'm not even sure this isn't a troll post.

Just make sure that you record the outcome for the rest of us to watch. I've not heard of dudes using 4895 in a .300WM either, but Hodgdon lists load data for bullets UP TO 155gr...and even then it maxes out at 65.5gr. Your data of 60+12 with a 208 is a really bad idea. Hope you survive it with minimal damage man.

*For faster speeds with heavier bullets in a 26" .300WM, you want a slow burning powder anyway. Think H1000/Retumbo range if you look up a burn rate chart.
 
#11
Don't do it! You could, at the very least, experience catastrophic spontaneous disassembly of your weapon, and quite possibly serious injury and/or death.

If you need speed, try IMR-8133, if you can find it. I get 2920-2940 fps with 208gr eldm's and 210gr RDF's from a 26" pipe. No pressure signs, and very accurate.
 
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#13
BLEE said:
Obviously, I'm a custom load newb. Is a compressed load of mixed powders a real thing?
Click to expand...

I figure if you are looking for overpressure adding fast burn to slow burn powders you might as well fill the case and go all the way. It's not a mans load unless it crunches when you seat the bullet.

Seriously to the OP. Don't.
 
#17
918v said:
That’s how you would keep the two columns of powder from mixing. Duplex loads are nothing new, but it’s something people should stay away from if they have to ask.
Click to expand...
I recall reading about duplex loads a few years back. It's nothing I'd every tackle. I have no need.
 
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