AR for high power matches

SubGunFan wrote:

DevilDog wrote:Hey SubGunFan! Phillip thinks I need to mess with my front sight! What should I tell him?

It's flush right now. I'm not messing with it until I have, like, 4+ hours at the range by myself to get it right.

If you want a 100yd or 200yd zero at 3/8 setting, then I give you permission to mess with the front sight.

.

I mess with my front sight just for fun sometimes.

Productive day at MRPC today. Besides getting to see some cool milsurp guns, I got a new zero on my rifle.

I'm sure there is a more precise way to do this, but basically by rotating the front sight post clockwise, you are screwing the front sight down into the rifle, thus raising the strike of the round. You can then crank the rear sight down (counterclockwise) to get the groups back in the x-ring. By trial and error, I was able to reduce my 200 yero by 22 clicks (5 1/2 MOA) on my rear sight. So now I'm starting at just 10 from the bottom, instead of 32.

This was the first I've shot my rifle from a bench rest in a while, and I learned something else. BIG difference in Black Hills 77 gr. and M855 62 gr. green tip, even at 200. The green tip did not group near as well. I will suck it up and spring for the Black Hills from now on.

DevilDog wrote:

PhillipM wrote:Devil Dog and I both have 1/4". I like mine for the precision and he wants to change his to 1/2" for ease of use.

My new RR came with a rear sight has a windage adjustment knob that apparently can be flipped over to change it from 1/4 to 1/2. But I would not trust myself to do it.

1/4 MOA clicks are too much of a good thing for me. My 600 yd elevation is somewhere between 106 and 112 clicks from bottom, and that is just too much math for me to do on the line. And with 1/4 MOA windage adjustments you can hardly tell the sight has moved. I took a paint pen and marked mine in several places just so I could get a zero reference point.

You have to be a very, very good shooter (and Phillip is) to take advantage of 1/4 MOA sights. 1/2 MOA is good enough for most good to above average shooters, IMO. If I had to do it again I'd go with 1/2, and take up the slack with my point of aim.

I just have the 200 zero for the RR rifle I use written down. I click up & shoot. I also have the clicks up for 300 & 600, each from the previous stage, i.e. from 200 > 300 and from 300 > 600. Just count up. Yeah with the 1/4" it is about 48 clicks from 300>600 but I only have to count that high once...

DevilDog wrote:BIG difference in Black Hills 77 gr. and M855 62 gr. green tip, even at 200. The green tip did not group near as well. I will suck it up and spring for the Black Hills from now on.

IIRC the military's spec for M855 is 4 MOA = 8" at 200 yds. So don't expect the M855 to be really competitive. I have come across some good lots of M855, but they vary WIDELY in my experience, shooting M855 both in a Rock River NM and in a Bushmaster M4 type rifle. Mass production, luck of the draw, etc. You are right to go with the Black Hills if you do not intend to reload.

Alright is there a any advantage to getting the pre-ban w/threaded barrel over the post ban without it? I ordered the post ban without it cause I like the way it looks better, whats yalls thoughts?

We don't bayonet targets and the muzzle flash isn't an issue in broad daylight.

PhillipM wrote:We don't bayonet targets and the muzzle flash isn't an issue in broad daylight.

hell at 600# I might have to use the bayo, thanks pm

Everyone freaks about 600 yards. The sight picture is exactly the same at 200 and 300. Your first goal is to put them in the black, we all have experience as target pullers finding the hole on the 16 square foot target. One of the first matches I went to was the high power championship in Louisiana, came in dead last but learned much.

dhollis51 wrote:Alright is there a any advantage to getting the pre-ban w/threaded barrel over the post ban without it? I ordered the post ban without it cause I like the way it looks better, whats yalls thoughts?

I don't think it matters in terms of accuracy.

DevilDog wrote:

dhollis51 wrote:Alright is there a any advantage to getting the pre-ban w/threaded barrel over the post ban without it? I ordered the post ban without it cause I like the way it looks better, whats yalls thoughts?

I don't think it matters in terms of accuracy.

I agree, you see both on the line at HP matches. Personal preference as to what you like to look at, IMO.

The only moderately accurate Green Tip 62 gr we ever had in 5.56mm was a lot of British Radway Green made in 1993. We bought 3000 rounds of it for under $200 per 1000. Then ammo went crazy in price. It would print under 1.5" at 100 yards. We also bought 4000 rounds of Federal green tip (unfortunately). It was 4-5" at 100 yards. Fortuately, we sold it for 1/2 more than we bought it for. When I used to shoot the XTC matches, my AR was loaded with 68 gr hornady Match Bullets and Sierra 80 gr or Hornady 75 gr A-Max bullets. I use IMR 4895 for the propellant and CCI small rifle primers. I recommend CCI primers as their rifle primers are harder than WW or Remington.

I had a slam fire in a Regional Tournament at Bogue Chitto in 1993. I was using a Compass Lake AR and it was quite a surprise. The primer was a Remington small rifle primer. The rest of the day (when loading single shot) I used the charging handle to lower the bolt and hit the forward assist to be sure the bolt was closed. Fortunately, it was my first sighter shot. I lost a sighter but it could have been a shot for record. I have a Rock River AR-15-A2 NM rifle and I believe it is equal to the Colt converted Compass Lake rifle, at half the cost.

Doug

PhillipM wrote:Everyone freaks about 600 yards. The sight picture is exactly the same at 200 and 300. Your first goal is to put them in the black, we all have experience as target pullers finding the hole on the 16 square foot target. One of the first matches I went to was the high power championship in Louisiana, came in dead last but learned much.

I figured that, I felt the same way before I shot my first 200# match at magnolia. it seems really hard but just like everything else all it takes is practice. Ill be there with both my M1A and my AR when I get it to shootin.

Gess I will keep what I ordered and try my best

You lose or win the match standing at 200 anyway.