7 PRC is incredible in short barrels

1

Shot Hornady precision Hunter ammo out of my 20” 7 PRC and my 24” 7 PRC. Velocity difference? Just 55fps.

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2

Thats an interesting discovery. I am curious as to why that might be happening. I have known reloaders to sqeeze higher velocity out of shorter barrels but this is different ( being factory ammo). Certainly there is more powder burning in the longer barrel?

3

It’s a pretty fat case, which helps to burn powder faster, but I know Hornady really wanted this in short barrels, so they may be using a faster powder.

4

I wish you could get the results out of a 18 inch barrel. If it’s only going to drop another 55 or so that would be an awesome length for a suppressor. I love shooting a suppressor but hate when it makes the rifle like 28 inches long.

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5

Jim:

The following barrel-length test-series would be highly informative to this community – especially as regarding those having interest in suppressed hunting options:

Using otherwise identical Browning X-bolt 6.5-PRCs, assess muzzle-velocities for their 20, 24 & 26-inch barrel-length offerings – all using the same factory ammunition [ideally, Hornady’s 130gr CX Outfitter ammo*].

A wide range of rule-of-thumb “opinions” exists regarding velocity differences per inch of barrel-length for various cartdidges.** Now, with options available from Browning in this relatively new chambering, real-world numbers could readily be established.

  • Please contact me to best discern the logic behind the suggested test-ammo, and to discuss other proposed test-parameters [and my willingness to fund the needed factory ammo, and the possibly of post-test purchase of one of the test-rifles].

** Depending on one’s source, everything from as low as 8-fps/inch to as high as 50-fps/inch of barrel-length change has been suggested as on various forums. This would be an excellent opportunity to assess the reality, at least as regarding one nominal factory loading.

Thanks,
DM

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6

Good idea. I’ll see if I can get my hands on those.

7

Thanks for considering this, Jim. (Their “Mountain Pro” configurations [in 20", 24" & 26"] look most appealing.)

8

Will this concept apply to 7 rem mag?
Furthermore, can you guys give me some insight here please, I appreciate everyone’s input in advance.
I am looking to build or customize 7 RM, What will be the shortest acceptable barrel length topped with suppressor to meet these parameters:
-Effective range 600 yrds,
-Energy at POI 1500

Thanks again