16” 7PRC Build - The Rifle that Might Could

Chase723

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ALCON-

I know there's lots of threads out there with info on 18-22" 7PRCs however there's nothing about 16"…so I figured I'd post this out into the ether so that if anyone else in the future gets the same hankering they'll at least have one point of reference. To some, this is blasphemy. To others, this might be the future.

Like pretty much everyone who got into long range shooting and hunting I started off with long, heavy barrels. They all had "optimal" barrel lengths, allowing for complete powder burn and maximum velocities, and they all shot great. However, they all sucked to hump around. Once I got into suppressors they became even longer and sucked even more…like carrying around a boat oar.

That started me on the journey of cutting barrels back. Over time, what I have come to realize is that from a pragmatic perspective I gave up essentially nothing by going shorter, especially with efficient heavy for caliber projectiles. Yes, I certainly gave up some velocity but that only counts on the extreme backend. Lose 200-300fps, lose 200-300 yards of supersonic range…but who cares when you're still supersonic to 1500-1800 yards? My guess is that there is a limit to this somewhere when the amount of unburned powder creates some uneven ballistic turbulence and accuracy will deteriorate but I currently haven't found that…which prompted me to embark on this project (and another in 6.5 Creed which involves a 14.5" barrel pinned and welded to 16" which I'll also post about once complete).

Therefore, I'm undertaking the following build and will update this thread with pics and data once complete. Everything is ordered, probably going to be 3-4 months until complete.

Impact NBK LA Mag w/ their new 75deg bolt
16" Bartlein 1:8 Heavy Palma Murder Hornet fluted by LRI and cerakoted Elite Sand
TriggerTech Diamond
Manners T2A GAP w/ Badger EFR and full length ARCA in swamp camo
3 round AICS mags
Silencerco 3 port ASR brake
8" Form 1 suppressor
ZCO 4-20 in QD Spuhr

I'm guessing that it'll shoot the 180 ELD-Ms at ~2600fps, which will remain supersonic to 1800 yards. 1600fps at 1250 yards w/ 1000ft/lbs.

The goal isn't ultralight. The goal is lightish but ultra functional. I expect it to weigh ~10lbs complete w/optics, mag, and suppressor. Short, very packable, stable, relatively quiet, mild recoil, should look awesome, and a should be a hammer. The little rifle that might could.
 
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Any update? Yesterday I visited with my smith, he has all the parts (minus barrel).
He is ordering an 18" Brux #4 barrel 1-8 and going to spiral flute.
Should be a fun rifle suppressed.
 
Altus said it should be done this coming week or the following. I took my 14.5" pinned 6.5 Creed out to 720 this past weekend no problem. 6.5 is running the 130gr Berger at 2624fps. So, I have high hopes for the 7PRC.
 
Just picked it up. Will weigh and post pics hopefully tomorrow. Build changed a little bit. I ended up using a Terminus action and a Heavy Palma barrel contour so am interested to see where it settled out. Whatever it is it feels right. Haha. Here's the pic that Altus sent me that they took in their shop. The Elite Sand cerakote is a little more grey in person. Looks awesome.
ALTUS CUstom RIFLe.jpeg
 
Excellent execution of a build. I've been shooting suppressed only for 10+ years and my barrels just keep getting shorter.
 
When I reload for it I'll probably use the 180gr ELD-M…but there are several good choices available…I'm somewhat undecided. 168gr, 180gr, and 190gr Bergers also have me wondering. My experience with the 190s in the 7SS has been very good…I've got N565 and Retumbo. Both should work. I may pic up some H4831sc. While velocity would be in the slower side, people seem to shoot really tight groups with it in the 7PRC.
 
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What altitude are you figuring your numbers out for 180's at 2600 fps ?
I ran the 180 at 2600 fps at 2450 ' and get nowhere near what your saying.
1200yards gives me 1495 fps / 894 Ft/lb
 

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