Long Range Chances

[Capt. Frank]

No, but it is different for each rifle, your idea about contacting the rifling may be good place to start. In my 6.5x55, I used Hornady's seating depth, and got good results.

[blfrankjr]

As others have stated staying supersonic is the critical part. I use to shoot LR a good bit with an M1A and 175 SMKs so they will perform.
If you need zeros I always found the "thermometer" target works very well not only for elevation but to make sure your windage tracks as the sight goes up. You don't want to be that guy who fires immediately as they give the command so he can gauge his windage by which target goes down. If you need it I can get the official name of the target.
I would not be surprised if you didn't have to file some on your front sight to get the elevation you need.

[Parashooter]

Good luck on the elevation with that 'A3! (Or do you have an aftermarket rear sight on it?)

You'll need a "come-up" of about 35 MOA from 200 to 1000 with MatchKing or A-Max at ~2650fps - and the issue 'A3 sight only goes up some 29 MOA from 200 to the 800 max graduation. Here's a breakdown from engineer and distinguished rifleman Bob S. - https://www.tapatalk.com/groups/collectorguns35625/table-of-elevations-for-03a3-rear-sight-t3769.html

Image below shows calculated ballistics for the 175 MK at 2650 fps. "Clicks" are 1 MOA.

[Capt. Frank]

The Bridgeville Rifle and Pistol Club is installing a large gong at 1000 yards. All match shooters will have to hit the gong, before they can shoot the electronic targets. This to prevent damage to the targets, by someone who does not have a correct 1000 yard zero.

[psteinmayer]

My rear sight is the standard 03A3 rear sight. In order to shoot in a CMP match "As Issued", it can't be altered.

It sounds like I have a butt-ton of homework to do! I may have to alter my POA to compensate.

[Parashooter]

My rear sight is the standard 03A3 rear sight. In order to shoot in a CMP match "As Issued", it can't be altered. . .

But the CMP Long Range Matches aren't "as-issued". (You're shooting a Krag in the as-issued matches, right?)

Following text is copied from the 2019 Long Range Schedule -

2019 National Long Range Match Schedule
Monday, 5 August
9:00AM Viale Memorial Match Viale Range
Unlimited Sighting Shots & 20 Record Shots in 30 minutes @ 1000 Yards
Match Rifle/ Iron Sights, Service Rifle or Palma Rifle
Critchfield Memorial Match
Unlimited Sighting Shots & 20 Record Shots in 30 minutes @ 1000 Yards
Match Rifle/ Iron Sights, Service Rifle or Palma Rifle

Tuesday, 6 August
9:00AM Kerr Memorial Match Viale Range
Unlimited Sighting Shots & 20 Record Shots in 30 minutes @ 1000 Yards
Match Rifle/Any Sights, Service Rifle or Palma Rifle
Henry Memorial Match
Unlimited Sighting Shots & 20 Record Shots in 30 minutes @ 1000 Yards
Match Rifle/ Any Sights, Service Rifle or Palma Rifle

And from the 2019 Highpower Competition Rules -

5.10 CMP Long Range Courses
The CMP Long Range Courses are CMP highpower rifle events that are conducted during the National Matches and may be conducted in other CMP-sanctioned competitions. Competitors may use the Service Rifle (Rules 4.1.1, 4.1.3, 4.1.4), Alternative Rifle (Rule 4.1.2), Match Rifle (Rule 4.1.5) and the Long Range Service Rifle (Rule 4.1.6).

[psteinmayer]

Actually, I'm shooting my Krag in the Roosevelt Match, my K-31 in Vintage, and my 1903A3 in the Springfield Match... all are As Issued. Since I only have one 03A3, I would be altering the rifle and it would no longer be eligible for the Springfield Match, unless I alter it after the match. The bottom line is I don't really want to have to change it, and I only own one. So I may have to set the rear sight for a different elevation to be on point at 1000 yards, OR... find my point of aim for 1000 yards and treat it like Kentucky Windage (aim for a point above the bullseye).

[madsenshooter]

Unlimited sighters, bring lots of rounds! LOL! I've always paid attention to Bob S info, you do have a lot of things to think about Paul. Seating your bullets out to the rifling is good, gives one a bit more room for the powder you'll need to get the velocity.

[Parashooter]

Actually, I'm shooting my Krag in the Roosevelt Match, my K-31 in Vintage, and my 1903A3 in the Springfield Match . . . So I may have to set the rear sight for a different elevation to be on point at 1000 yards, OR... find my point of aim for 1000 yards and treat it like Kentucky Windage (aim for a point above the bullseye).

I thought the Springfield/Vintage match was a combined event (running on two days). Do they let you register twice (once for each day)?

Anyway, since you'd need to aim some 6-feet high to hit the 1000-yard bull and there ain't nothing up there but sky, eagles, and Lake Erie, you might as well cut another front blade short enough to get you in the center with your preferred hold.

Center hold: +6.5 MOA x .008" = .051" shorter (presuming issue blade prints center at 200 yard setting and range)
6:00 hold: +2.1 MOA for 22" radius of aiming black x .008" = .017": Total .068" shorter
Frame hold: +3.4 MOA for half of 6' frame height x .008 = .027": Total .078" shorter.

You can check the blade at 100 yards by setting the elevation to 800 and looking for a group 39.6" above center bull - or 74.6 at 200 (presuming a MV near 2650 fps and BC near .500. Scrounge a chronograph!). If using a 6:00 hold, use an 8.8" aiming black to emulate the size of the 44" LR target black at 1000 yards. Leave the blade a bit tall and bring a file to the range for final adjustment.

Once that short blade is finalized, see where she hits at the 200-yard setting and adjust your hold for the Springfield Match - or bring the original blade, a hammer, and a pin punch to Perry so you can swap out there.

Long Range is a different animal - fun but frustrating!

[madsenshooter]

Some more Bob S 03A3 long range info I ran across. https://www.tapatalk.com/groups/collectorguns35625/table-of-elevations-for-03a3-rear-sight-t3769.html