Reloading 7mm PRC

[Phil Rizzo]

R26 went to 3060 but shot best around 3040.
H1000 went to 3024 but likes 2985 area.
With 175 EH at .045 off
24" BartLein #3

If I try another powder it will be n565. Got a pile of it

 

[Phil Rizzo]

I don't know how much faith to place in my load work when it's 85-100* and I never hunt over 50. Guess time will tell. Should be close anyhow

 

[quigley257]

I've been running 70gr of Retumbo under the 175 ELDX in most of the rifles that we have built. I'm using Hornady brass and GM215M primers. It seems like a great all around load as I haven't had any rifles not meet our accuracy standard which is under 1/2" at 100 yards for all 30 cal and under. This load runs a consistent 3000 FPS out of a 24" barrel. Pretty hard to argue with those results! I'm definitely going to have to build myself a 7PRC one of these days...

 

[Rick Richard]

I've been running 70gr of Retumbo under the 175 ELDX in most of the rifles that we have built. I'm using Hornady brass and GM215M primers. It seems like a great all around load as I haven't had any rifles not meet our accuracy standard which is under 1/2" at 100 yards for all 30 cal and under. This load runs a consistent 3000 FPS out of a 24" barrel. Pretty hard to argue with those results! I'm definitely going to have to build myself a 7PRC one of these days...

How many firings are you getting out of that Hornady brass?

 

[quigley257]

How many firings are you getting out of that Hornady brass?

I have 2 sets of brass that are on their 6th loading as of this morning still with tight primer pockets.

 

[Trm82]

I have 2 sets of brass that are on their 6th loading as of this morning still with tight primer pockets.

How are you doing that ?

Mine have very little resistance when you seat a primer in the unfired stuff that I've been just pulling the bullets on factory ammo.
Not hot loads and I will probably be tossing it after 3 shots.
My goal was 3000 with 175 EH but I don't think this brass will let me get there unless I just want to use it once.

 

[Benny119]

How are you doing that ?

Mine have **** near no resistance when you seat a primer in the unfired stuff.
Not hot loads and I will probably be tossing it after 3 shots.
My goal was 3000 with 175 EH but I don't think this brass will let me get there unless I just want to use it once.

The first firing on new brass needs to be at a lower pressure. The impact will help work harden the primer pockets.

I bought factory ammo when it was first available. After firing 20 rds I realized it was over pressure. I pulled the rest of the factory ammo (over 100 rounds) removed 3 grains of powder from each round and reseated the bullets. I've now got 3 firings on the brass and it is still great. I do anneal the necks after every firing though.

Other important factors are what powder you are using to achieve your goal, chamber dimensions and barrel length.

 

[Trm82]

The first firing on new brass needs to be at a lower pressure. The impact will help work harden the primer pockets.

I bought factory ammo when it was first available. After firing 20 rds I realized it was over pressure. I pulled the rest of the factory ammo (over 100 rounds) removed 3 grains of powder from each round and reseated the bullets. I've now got 3 firings on the brass and it is still great. I do anneal the necks after every firing though.

Other important factors are what powder you are using to achieve your goal, chamber dimensions and barrel length.

I was getting pressure on the factory stuff I fired also.
I was only getting 2820 fps with the factory 175 ammo and have pressure there.

My load is with RL 26 66.5 gr and 175 EH at 2924 fps in a SAAMI chamber 24" proof 1-8.4 twist.
Shoots awesome with RL26 but I think I will try some retumbo and H1000.

 

[Rick Richard]

How are you doing that ?

Mine have very little resistance when you seat a primer in the unfired stuff that I've been just pulling the bullets on factory ammo.
Not hot loads and I will probably be tossing it after 3 shots.
My goal was 3000 with 175 EH but I don't think this brass will let me get there unless I just want to use it once.

Typical Hornady brass…junk.

 

[quigley257]

How are you doing that ?

Mine have very little resistance when you seat a primer in the unfired stuff that I've been just pulling the bullets on factory ammo.
Not hot loads and I will probably be tossing it after 3 shots.
My goal was 3000 with 175 EH but I don't think this brass will let me get there unless I just want to use it once.

Hard to say. It could be a number of things. I'm using some of the earliest brass available from Hornady. None of it has "the ring" on the case head. As a rule, our barrels tend to shoot faster than other brands with the same given load.

 

[mtshtr]

Anybody use staball 6.5 with 7mm prc? I have some and am curious if burn rate too quick. 26" barrel and 175-180 bullets preferred but might try 162 eldx if needed.

Have been loading a couple hundred 180 eld m with 7828ssc and havr been able to get half moa at 500 yds.
But not temp stable.

 

[P7M13]

I've loaded several hundred rounds through my 7 LRM, and found with the 180's, I got better velocities out of H1000 or similar speeds (IMR7977) than Retumbo. N570 left unburnt kernels in the barrel. Perhaps I didn't 'overload' it, which would have created a higher initial pressure and more efficient burn.

 

[Hoss50]

In the 300 Win mag with heavier bullets I see alot of guys showing good results. That is with 215gr class bullets. It might be slow for the lighter bullets. I am going to try it with 208gr Bergers in a WM. H1000 is supposed to be a good one too. I am going to try that as well, along with some old school 7828ssc.

 

[BlazerBeam]

Peterson brass. 175 eldx .030 off. CCI250. 66.2 grains RL26

3015 FPS