What distance to sight-in?

[rob_s]

Are there no limits to what you are "allowed" to carry?

[Lawdog-1]

Rob s, you are taling about ammo right, It has to be 55 gr. FMG.

[markm]

If it has to be 55gr FMJ, I'd go with an M193 load.

Q3131a (Win M193 made in Israel) would be optimal. I'd avoid Q3131 as the last pair of retail boxes I bought were pretty Nasty... Mixed head stamps, and skanky looking.

XM193 from Federal is another decent choice.

[Lawdog-1]

I forgot to that I can't use the steel core FMJ, it has to be the lead core FMJ.

[markm]

I forgot to that I can't use the steel core FMJ, it has to be the lead core FMJ.

I've never heard of any steel core 55gr FMJ anyway.

[R Moran]

I like the 50mtr zero, we use it at work, your within 2 inches of your POA according to Pauls chart, mopst people aren't going to be able to shoot that good on the 2 way range.

Hell, in a recent Vickers class, he basically said most people wont remember the offset for closer ranges anyway.

Ammo, I've had alot of trouble with Q3131/a, we also had some bad stuff at work.

Federal used ot have some 55grn FMJ in the Tactical line, not sure if they still do. I would look at American Eagle, or see if Black Hills/ Hornady makes a "duty quality" 55grn FMJ. Sealed case, primer, cannelure to keep the bullet in place and I believe it helps fragmentation.

Bob

[jackinfl]

Paul,
Can you run and post the same DATA for 25 yard POA/POI? Thanks

[paulosantos]

With a 25 yard zero here are the trajectories:
25 yards: 0".
50 yards: 2.4" high.
75 yards: 4.5" high.
100 yards: 6.3" high.
150 yards: 9.1" high.
200 yards: 10.5" high.
250 yards: 10.4" high.
300 yards: 8.5" high.
350 yards: 4.4" high.
400 yards: -2.1" low.

Here is the program for anyone interested:

http://www.eskimo.com/~jbm/calculations/traj/traj.html

[f.2]

5.56 mm duty loads, Tactical Forums, member DocGKR