300 PRC info

[hogpatrol]

300 PRC blowup and a knock on the brass.

https://matchgrademachine.com/we-bl...nt=exploding+prc&utm_campaign=300+PRC+Blow+Up

 

[moondog]

I'm going to try NOT to run pistol powder in mine. Yeah, the brass grows with hot loads. Not so much with moderate loadings. I'm currently cycling through 50 pieces doing load development and monitoring brass.
I have 300 fired once with a moderate load once I figure it out. It's certainly not Lapua!

 

[FrankG]

I'm going to try NOT to run pistol powder in mine. Yeah, the brass grows with hot loads. Not so much with moderate loadings. I'm currently cycling through 50 pieces doing load development and monitoring brass.
I have 300 fired once with a moderate load once I figure it out. It's certainly not Lapua!

What’s your load?

 

[FrankG]

The T/C and .300 PRC or other big calibers.

Anyone give any thought to the diameter of the barrel, pressure and the yield and tensile strength of the material?

There are minimums that should be adhered to as well as built in safety factors etc...

There are reasons such as the above that even in light weight hunting rifles with pencil thin barrels and depending on the caliber the barrel is chambered in magnum rounds are not recommended.

Also either by accident or intentionally loading pistol powder or in improper powder in a caliber it’s not designed for things like this will happen. Doesn’t matter if it’s a T/C or some bolt gun or in a gas gun. You think it up and it’s probably been done and again accident or intentionally. See things where guys loaded the wrong powder in everything from .308 to magnum rounds and pressures hit as high as 150k psi. You start hitting 80k and higher pressures and sooner or later something is going to give.

On other threads on forums or even talking to customers on the phone, email or at matches and I hear the load they are running and try and tell them your load is exceeding normal working pressures and they should back it off and at times I get back....well the bolt doesn’t lift hard, the primers are not flat etc.....just because you don’t necessarily see it doesn’t mean that it is not there/happening.

I still don't understand how the PRC fits into this whole thing and why it seems like part of it was to hammer on the PRC round? Doesn't make any sense.

 

[moondog]

What’s your load?

I'm currently testing 4 different bullets.
225eld, 230 Atip, 215Berger, 200 Sierra.
3 powders, h1000, Retumbo, Reloader 26.
225s 78 to 80 h1000, 74 to 78 Reloader, 77 to 79 Retumbo. Good accuracy but poor es
Berger 225s 79 to 81 H1000 good groups on a lower node. But -045 jump to mag feed.
Atips, -.015 74 to 76 Reloader 26, not promising.
200 grn Sierras, -.100 to mag feed , just h1000 and promising.
Most all loads have a less than desirable es.
Primers tried, 210s 215s,BR2s,cci250 Remington. Back out tomorrow with the best looking loads and some CCI 200s as per your recommendations to see if the es comes down. As of now, the 225s with 74 grains of 26 are looking good. 215 Bergers 80.5 grains H1000 look promising as well. All testing done at 850. I'll also try some once fired brass to see if that may be messing with me.
Brass annealed every firing.

 

[B23]

On other threads on forums or even talking to customers on the phone, email or at matches and I hear the load they are running and try and tell them your load is exceeding normal working pressures and they should back it off and at times I get back....well the bolt doesn’t lift hard, the primers are not flat etc.....just because you don’t necessarily see it doesn’t mean that it is not there/happening.

Or, they talk about these blazing fast velocities they're getting "with no pressure signs" and how it's just a fast barrel. As Frank knows better than most, sure, barrels vary and some are a little faster than others, but if you're getting 100-200+ fps faster, it's not because you have a "fast" barrel.

 

[DirtySteve]

Am I the only person that thinks some one intentionally blowing up a gun with pistol powder should not be allowed to use crayons unsupervised..??? I mean to what end was this done? There is no point to it. Loading it with an appropriate powder and an over charge of that powder can yield some information, did it fly apart or just wreck it.? Would the shooter walk a way or need EMS? I guess I may just be old and can not stand stupid stuff as well as I once could.

 

[DHuffman]

So the 300 PRC was too much round for their gun so they intentionally blew it up and vowed never to chamber the cartridge.

Shameless publicity stunts and attention grabs under false pretenses will not make a customer out of me.

 

[B23]

We all see things differently, but for me, if I was the manufacturer of that particular rifle, I'd actually be a little pissed and not see that little stunk as good press. Granted, we all can admit that was a crazy over pressure load and it blew up to no fault of the gun, but if I were the manufacture of that gun I'd be concerned about all the people only focusing on and talking about how my gun blew up and not so much about how it was a crazy stunt.

 

[maddysdad]

is lapua or remington goinig to make this round for us reloaders.it would be agreat addition to one of them ..
gary b

 

[moondog]

Update kinda
Ran the 300 PRC out to 1655 this morning.
320 ATips and 215 Bergers. Ran them through the Chrony at the same time.
What I did find is the 5x fired brass has gone to hell. Meaning the groups have a 12" spread and high ES. Once fired brass, half that and lower ES. Also the CCI 200 primers did reduce the es down to 4! I ran out of 225s to try at distance so that will wait till next week. Not sure why the 4 to 5x fired brass is gone to hell group wise. I Anneal every firing. I ran into this issue with the Nosler brass in 7 SAUM. Good news is the Hornady brass is cheap.

 

[moondog]

Gotta give a Shout out to Frank G
I was having trouble getting the ES down in my 300PRC.got close, but not acceptable. 3 different powders, 5 different bullets, 5 different primers. On a post somewhere, Frank said CCI 200 primers cut his ES in half. Of course the only ones I didn't have to try! Got some, loaded up a couple of my best loads to date. Brought my ES down to 4 over 7 rounds. Got a zero, confirmed at 850, went to 1635. Gold! Never would have tried em. Thanks Frank.

 

[DDRH65PRC]

@FrangkG How are the CCI 200 primers compared to BR2 primers?
I was using WLRP previously and they work good.
The CCI BR2 seems to be a bit more consistent. and i have a lot of both primers. Also have alot of the FGMM250, but no CCI200.

 

[FrankG]

@FrangkG How are the CCI 200 primers compared to BR2 primers?
I was using WLRP previously and they work good.
The CCI BR2 seems to be a bit more consistent. and i have a lot of both primers. Also have alot of the FGMM250, but no CCI200.

Haven’t tried the BR2’s. Sorry! The CCI200’s work so good I haven’t had a reason to try anything else. I don’t know how I could improve upon the loads right now.

Later, Frank