7mm PRC

[southpa]

So, by 10% less performance do you mean that given same bullet and same powder charge, the 7PRC is 10% less velocity than the 7RM? I.e. if the 7RM gets 3,000 fps the 7PRC only gets 2,700?

In a 22" probly. But generally no, not really. 10% is a figure that sounded good hahaa. And i said "about 10%". It's rather more like 5-7%. And some do meet the performance of the 7rm, I'm sure of that. But most don't build a 7prc expecting it to hit 3000fps with 180s. They build one hoping it meets that. The edge in case capacity will go to the 7rm. And a properly throated one even more.

 

[southpa]

So how 'bout that 7-300PRC?

This is what hornady should have done IMO!! And it may be in the future for me.

 

[dustbag]

Saami v Saami the PRC is a better design. If y'all wanna buy a Chevy cavalier and change the frame the motor the suspension and tires and claim the old cavalier is better than the new corvette go right get ahead. I've got no dog in this fight. Seems like a waste of energy.
Carry on…

 

[highfinblue]

I'm not knocking the PRC (although personally I think the PRCs are a gimmick) but I'm curious what makes this cartridge give "efficiency" vibes? Isn't the PRC essentially at about 10% less capacity and performs essentially at 10% of the 7RM? What is so "efficient" about something that does this? I think it's a fine choice for someone I just don't see what's so efficient about something that finishes behind its predecessor?

It's been a long time since I owned a 7RM, but I have no problem getting close to 3000 fps with 175 grain pills, and I never got much over 2900 with my last 7RM with 162's. All rifles are definitely different, and I have not looked at any comparative studies, but in my super small experience I have been pleasantly surprised by the PRC. Shorter, lighter, less recoil, but I'm suppressed now, and it is super accurate. Killed a ton of game with that old M77, but my PRC has been fairly easy when I finally discovered what it liked.

 

[Hard Head]

Dude just give it a rest. You open up with not knocking the PRC and then proceed to knock the PRC. The efficiencies are there and have been described in numerous articles. They both have their merits. The 7 RM is a venerable cartridge that is legendary. I took an elk with one in WY several years ago and it performed beautifully. They are almost interchangeable performance wise honestly, depending on the bullet. There is a reason people build 7 RMs w 1:8 as an example (and other features) that the PRC already has. Designs have evolved. Bullets have changed. It doesn't make one "better" than the other. It's all about applications and tastes. They both have their merits, as does the 280 AI, RUM, STW, -08 and a slew of other 7 MM cartridges.

I own a 7mm prc, and I love it. PERIOD!! I have owned many 7mm Rems and all were great cartridges and did what I wanted them to do . They were in Winchesters,&00's ,Browning ,and Ruger .Mine shoots 180 Hornady's day in and day out at 2930-2950 with a sd of 3,4-5.8. The thing that I always said is...........I Hate belts on a cartridge, they can cause feeding problems , and you have a shoulder to head space of of use it. Peterson brass,Stabll HD and Fed 215mag match primers and Hornady's 180 , very sweet. Pete

 

[Buzzsaw]

Thanks for all this great information. I just brought home a Horizon Venatic Carbon in 7mmPRC. 22" 1-8 twist carbon fiber barrel.

I have H1000 and Retumbo. Maybe some VV for this burn rate.

 

[Rosebud]

I'm a little bit late on this thread,and didn't read them all. But here's what I'm doing with the 7PRC. 22 inch Barrel, 180 gr Hornadys ELDM @2998 using LRT. Not even the max load per Hornadys book.
Almost the same load with175 Berger EH at 2975. And there's not a hint of pressure signs on either one.

I'm running with a143 HH at 3260 but my load is off the books high. So figure that out for yourself. All load are very accurate, but the hammers are so much more accurate there's no comparison.
Today's powders are what makes the PRC line so much better than older cartridges, and faster twists. Load a 7RM with a 1 in 8 twist use the newer powders. Yeah it will do the same thing.

 

[Mcranch]

I had a barrel chambered for the 7prc 8 twist. I chose the Berger 175 to work up a load. I had a time with it utilizing H1000. I looked on Berger site and it stated that the 8 twist would be marginal for the Berger 175? It took 93 down the barrel before i found a good recipe that this barrel liked. I went from 66 to 70.5 grains and settled on 69 grains at 3040, 26 thou of the lands. The barrel I have is finished at 25 inches. I'm getting.5 and better at a 100. I don't know if the fps at 3040 for the 175 is considered good?That's just where this barrel seems to like. I got pressure at 70.5 ejector marks but no flattened primers, 1 split case on the 7th case loading at 70.5 grains? I did heat the necks up with a torch?The only 7mm cartridge I have to compare with is the 280 ai. On that cartridge I'm getting 3000 with the 140 accubond. So with the 175 at stated fps I think I'm getting a considerable gain. In my opinion.

 

[deputyrpa]

I'm a little bit late on this thread,and didn't read them all. But here's what I'm doing with the 7PRC. 22 inch Barrel, 180 gr Hornadys ELDM @2998 using LRT. Not even the max load per Hornadys book.
Almost the same load with175 Berger EH at 2975. And there's not a hint of pressure signs on either one.

I'm running with a143 HH at 3260 but my load is off the books high. So figure that out for yourself. All load are very accurate, but the hammers are so much more accurate there's no comparison.
Today's powders are what makes the PRC line so much better than older cartridges, and faster twists. Load a 7RM with a 1 in 8 twist use the newer powders. Yeah it will do the same thing.

That's zippity. My Proof won't come close tp that (I'm at 156' elevation). What rifle and/or barrel?

 

[deputyrpa]

I believe the PRC is factory loaded to higher pressures than the Remington Mag. To get full potential from the RM you have to reload and then it can perform like it should. Also quality brass is extremely helpful when you are trying to achieve max FPS

When I first picked up my 7PRC and had to jam with it to practice for elk season, I bought a case of Hornady PH with the 175 ELD-X. I noticed preesure signs on some brass, so I opened one up and it was Staball HD loaded to the max! I missed the lots which had RL26.

 

[Hard Head]

I never had good luck with Hornady brass, during the shortage bought 5 boxes of loaded so could reload,3 times and it stretched so much that primer pockets would not hold primer snug enough. Pulled the bullets kept them ,Scheels got some Peterson brass in and bought 4 boxes. I tried LRT as I had some left over from my 338 Lapua and tried it from spring ,summer and late fall. I found out that LRT was very temp sensitive so sprinkled it on the garden in the Winter. Bought 1 pound of Staboll HD, loaded it to Hodgdens data and was good, but not fantastic, when Bergara brought out their HMR Wilderness Carbon in 24" I got one at Scheels and tried the same loads ,soon found out the chamber was a little different, so loaded it to it's chamber dimensions. I was 90 fps faster and shot 3 shot groups at 1/4" groups at 100 winter spring and summer again. Went back Later and bought 10#s of it and did not look back. My first box of Peterson Brass gave out after 400 rounds. So it lasted way beyond the Hornady brass and HD powder is not Temperature sensitive. My loaded round is 3.392" OL My 2 rifles showed that there can be quite a different in results from good to Excellent !! Pete

 

[Rosebud]

That's zippity. My Proof won't come close tp that (I'm at 156' elevation). What rifle and/or barrel?

Fierce Rival CT, if you haven't checked out ram shot LRT you should get some. Just loaded up some in a 6.5x284 Norma for a friend using 140EH. 63.3 grains @3004 FPS I'm at about 1200 Ft elevation. Best group was five shot .424. Custom gun using Stiller action, I think its a Hart barrel.

 

[Ozihunter]

Gentlemen,
First of all, I would like to thank all the members of this forum for their good wishes for my speedy recovery after my left hip surgery.
Unfortunately, not everything went as the doctors promised and as I had hoped. The surgery itself was not performed in the time they promised, and I had to wait a long time. Secondly, I am not entirely satisfied with the results of the surgery. Now they are assuring me that everything is fine because I am a senior citizen (80 years old) and for my age the result of the surgery is quite OK.
That is the reason why I have not posted on the forum for a long time because I am still recovering or trying to recover and walk without crutches.
OK, I know that this is not a medical forum and I have said enough and there is no need to talk about my problems anymore.
But what makes me happy and what I am grateful for is that I have read many interesting opinions that are helping me a lot to make a decision regarding my rifle, a Winchester 70 in 7 mm RM caliber. Now I only plan to replace the barrel, still 26" but with a 1:8 twist. The barrel would be Lothar Walther – Germany.
(I live in Europe after all).
I believe that will be a good choice.
If you want to give me advice and offer a better solution I am ready to listen and consider it, if possible. I would like to point out that importing rifle barrels from the USA is now very complicated for us Europeans due to new American and also European laws.
Once again, thank you from the bottom of my heart for your effort, advice and understanding.
Ozihunter

 

[K.E.C. Darkside]

I hope and pray for your recovery and that all goes well.
A 8twt 26" in PRC or Rm will make a great gun. They are very Impressive no matter what one you choose.
I favor the PRC.
Get well soon.