AR 15: National Match Barrel vs Gov Profile

[nbkky71]

Read your CMP rulebook...

The CMP rules make no such mention of weight limits in the general or specific service rifle rules (CMP rules 6.1 and 6.2). Aside from the rules covering the trigger and gas system, the rules governing service rifles pertain to the exterior profile of the rifle, not the interior.

However, CMP rule 6.3.1 (3) states that as-issued rifles must conform to original weight specifications.

Also, the CMP has no "target class". You may be confusing this with the NRA service rifle/match rifle classes.

[emcon5]

Interesting, first time I heard the claim that adding weight to a rifle was not legal for CMP competition, and I can't find anything in the rules that would seem to back up that claim (except under the "as-issued" rules). Granted, I haven't competed actively for a few years, but I know a lot of people who shot black rifles who used stick-on wheel weights under their handguards and a lead wedge in the butt stock compartment to help balance the rifle.

Here is the rear one:
http://www.sinclairintl.com/.aspx/pi..._Wedge_Weight#

Can you please point out the section in the rules that says this would not be legal.

People who shoot the heavier bullets for 600 yds do not necessarily have an advantage, except in their mind.

Drift at 600 yards with a 10mph full value wind.
69 @ 2700fps 55in
77 @ 2650fps 46in
80 @ 2550fps 41in

If you say so.

[emcon5]

Stumbled across this ad this morning:

http://www.calguns.net/calgunforum/s...d.php?t=326209

[P-990]

Drift at 600 yards with a 10mph full value wind.
69 @ 2700fps 55in
77 @ 2650fps 46in
80 @ 2550fps 41in

If you say so.

And the 80 can be pushed to 2700-fps muzzle velocity, though a couple hundred feet per second doesn't make as much of a drift difference as a bullet with higher BC.

The added weights are 100% okay in Service Rifle competition. I think my rifle once passed tech at Camp Perry at about 16 pounds. And all of the match prepped M-14s/M1As and M-1 Garands are heavier than issued as well.

To the OP, big difference between a National Match prepped rifle, a basic HBAR and a carbine. If NRA match competition is your aim, get the NM rifle. For fun and carbine/tactical matches, get the carbine.