How is 7PRC better than 7 Rem Mag?

K

KCode

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Mar 25, 2019
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#1
I was looking at possibly getting a 7 Rem Mag rifle but then I just decided to look at the 7 PRC. The 7 Rem Mag has more case capacity for power, uses the same bullet sizes, but I was watching a video and saw this and the PRC is kicking it's butt.

Was thinking of grabbing a Bergara B-14 HMR for $900. Would that be about the best 7 PRC rifle for under $1000?

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#2
Google is your friend.

But I’ll throw a bone 🤣
PRC case design is superior to ancient of days 7RM.
PRC is 65k pressure
7RM is 61K

Those are just 2. Google the rest and educate yourself. Cheers
 
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#4
All the PRC cartridges are Evolutionary magnums optimized for modern high BC (long) bullets. Hornady is a SAAMI member so they are interested in standardizing the chamber and twist so that off the shelf rifles and ammo will work well. You can get to the same place with custom builds in older magnums, but that’s not Hornady’s focus.
 
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#7
This is like asking how 6CM is better than 243Win. If you're hand loading for a fast twist barrel there's no real advantage. However, 243Win and 7RM are not viewed in the marketplace as long-range precision cartridges while 6CM and 7PRC are. Off the shelf rifle and ammunition offerings for 7RM are generally hunting specific so if you want a factory LR rifle and ammo the 7PRC will be an advantage. There are exceptions but this is broadly true.
 
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#9
Late last year I did a good amount of research and was torn between 7 Rem Mag, 7 PRC and 300 PRC. I used factory data to help me calculate dope to 1 mile. Based on available data the 7 PRC was the winner due to having less recoil than the 300 PRC.
Fast forward to today, about 250rds into my 7 PRC with 24" barrel, I CANNOT get close to Hornady's advertised MV even with handloads. I can only get low 2900's using H1000 before seeing pressure signs and groups opening up. I am over 150 fps short when using Retumbo at max charge per Hodgdon's website. Your results may vary.
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#10
The answer to this question is easy.
The SAAMI specifications for each cartridge spell the difference.
The PRC is designed specifically for long, heavy for caliber, high BC bullets.
The Rem Mag is designed for lighter, shorter, lees efficient bullets (what they had when it was developed).
A 162 grain factory load is considered heavy for the rem mag with a few 175 grain loads available.
A 175 load is standard for the PRC with 180 being pretty common.
A standard bullet for the RM is the 139/140 class make up the majority of loads.
If you handload and have a custom throated RM barrel, there is no benefit in the PRC over the RM. Of course if you lose your ammo on your trip, your relegated to lighter bullet weights and a long jump to the lands with factory loads.
 
#11
KCode said:
Will these PRCs stay on top for a while or will we see another "better" calibers in say 3-4 years?
Click to expand...
Hornady has done a great job with basically every cartridge they have released, the likelihood of a new 7mm magnum appearing that is "better" is pretty slim.

Although I could see a short action 7mm magnum cartridge becoming popular but that wouldn't be better, unless you wanted a short action.
 
#12
All things being equal, the PRC isn't going to get you massive gains over the Rem Mag. The PRC is better designed to shoot heavy for caliber 7mm bullets better than the Rem mag. I've noticed I cannot seat bullets out as far in my Tikka in 7mm Rem mag. So if I decide to rebarrel, I'd probably go with PRC.

However, I do have a custom Savage that was chambered for the 180gr Berger Hybrid. It's amazingly accurate. The load I have is around 2950fps or so. This performance will be the same if I rechamber to PRC. I won't gain anything.
 
#13
there are a bevy of 'short magnums' introduced in the early 2000's, and the 270/300 are the only ones that seem to show any staying power. I'm basing that on multiple companies still building rifles and cataloging ammo for the cartridge.
 
#14
brazz04 said:
The 7PRC is a bit slower than what Hornady shows on the box. For example my 22" proof barrel on a Tikka is shooting the 175 ELD-X at 2825fps. The federal load with the ELD-X bullet is supposedly going a bit faster though so that may be a different option.

This thread has some info on it.
https://rokslide.com/forums/threads/whats-going-on-with-the-factory-hornady-7-prc-ammo.331387/
Click to expand...
My 22" C6 barrel gets around 2850 fps with factory 175 ELD-X, so very similar results.

N570 is where the velo is at. 74gr w/ Berger EH 175 gave me 3088 fps over a 10 shot group. Barrel burner, but it's a hunting setup so who cares.
 
#16
Cascade Hemi said:
If you're hand loading for a fast twist barrel there's no real advantage.
Click to expand...
The 7 PRC will mag feed with heavy bullet's seated above the donut

AznTactical said:
Late last year I did a good amount of research and was torn between 7 Rem Mag, 7 PRC and 300 PRC. I used factory data to help me calculate dope to 1 mile. Based on available data the 7 PRC was the winner due to having less recoil than the 300 PRC.
Fast forward to today, about 250rds into my 7 PRC with 24" barrel, I CANNOT get close to Hornady's advertised MV even with handloads. I can only get low 2900's using H1000 before seeing pressure signs and groups opening up. I am over 150 fps short when using Retumbo at max charge per Hodgdon's website. Your results may vary. View attachment 8460524
Click to expand...
From what I've seen box speeds are usually based on a 26" tube, which would be good for about 60 fps (or more) over a 24. Personally I'd keep increasing charge weight until I saw pressure signs and then back it off from there (obviously be careful).
Looking at your charts I'd say 2810 fps from a 300 PRC with a 225 is on the slow side, I'd imagine you'd get 2900-3000.
Also the 7-300 PRC i've seen are closer to 3200 with a 180.
 
#17
Taylorbok said:
From what I've seen box speeds are usually based on a 26" tube, which would be good for about 60 fps (or more) over a 24. Personally I'd keep increasing charge weight until I saw pressure signs and then back it off from there (obviously be careful).
Looking at your charts I'd say 2810 fps from a 300 PRC with a 225 is on the slow side, I'd imagine you'd get 2900-3000.
Also the 7-300 PRC i've seen are closer to 3200 with a 180.
Click to expand...
No, not in this case. All data that I extracted during my research PRIOR to settling with a 7 PRC are from 24" barrels. Even Hodgdon's and Hornady's reloading data are 24". No way a 225 ELDM can get close to 3k out of a 24" 300 PRC. My buddy's 30" 300 PRC is maxed out at 2990 with 225 ELDM with H1000. He run's em at 2950 to be safe.



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#18
AznTactical said:
No way a 225 ELDM can get close to 3k out of a 24" 300 PRC. My buddy's 30" 300 PRC is maxed out at 2990 with 225 ELDM with H1000. He run's em at 2950 to be safe.
Click to expand...
I run a 30 SM with a 32" tube and I run the 250's @ 2950-2975 fps depending on the barrel.
I've talked to a few guys who are running a 300 PRC at basically the same speed but everyone I've talked to is running N570.
That's what I was basing my numbers off.

I've run mine up a fair bit faster before I saw over pressure signs but I was happy with this speed and it seems to hold together well for long strings of fire
 
#19
The PRC being designed for heavy for caliber bullets is a great hunting cartridge. As is known, they designed it to run at 3000 fps but due to lack of availability of certain powders, due to the war, they had to use other blends and this dropped the speed. Federal must have had a stash of the fast blend because, unless you have a slow barrel you will get 3000 or more from their loads with a 24" barrel. Try the Federal Premium 7mm PRC 175gr ELD-X.
 
#22
I put together a 7mm RM for my brother about 3 years ago on an Origin action. The barrel is a 1:8.7 Krieger that was throated a little longer for the 168-180gr Bergers. It is a fantastic rifle that my brother raves about every time he shoots it. I think he drew a cow elk tag in SD this year, and is going to use it finally on game.

That being said; the 7 PRC does the same in a factory chambered option...minus the belt. There is the "advantage" of it IMO. It doesn't provide any real horsepower over the RM unless you're loading it to near max pressures.

I tried to like the 7 PRC well enough to put toget my own, but the more I read the less it excites me over my own 7mm RM...minus that optimization to run heavies. There's just not enough differentiation from the PRC and several other already existing cartridges (other than factory support).

^ In the end, I just bought a 7-300 PRC Manson reamer with a .225 freebore, and a 31", 1:8 Bartlein heavy palma blank. My goal is to have fun with the 190-195gr Bergers. The stuff is going to the gunsmith next week to get chambered so I can run a switch barrel setup on my old Surgeon 1086. I believe this is what the 7 PRC should have been.
 
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#23
KCode said:
Will these PRCs stay on top for a while or will we see another "better" calibers in say 3-4 years?
Click to expand...

More velocity equates to less barrel life and more recoil. So the question becomes which compromise is better to the individual. So 7mm Ultra Mag to me is way overbore and 7PRC more like what I'd go with, though 7Saum is tempting too.

I gotta say though that my friend has a 300PRC and a 7Saum and that 300 with 230's puts that 7Saum to shame in the wind. It's amazing to see how many more hits stay on the steel at longer distances with the 300. It does recoil more but its not bad since he has a large brake on it.

As far as reloading goes I don't like the magnum belts anymore after the fiasco of my last 7mag. After 3 firings a bulge just ahead of the belt caused hard bolt close so it was either buy the Willis tool or throw the brass away. I bought the tool and found out the extra step in the reloading process was silly afterall.

I'm running 6.5 Saum in a long action now but I might do 7PRC after this barrel.
 
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#24
I built a 284 Win-Imp and it finished just in time for 7 PRC to be released which is basically the exact performance I was looking for.
Next barrel I'll prob go to a 7 PRC, a few buddies have gone that route and it's nice to have interchangeable ammo if needed.
 
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