Wondering if I am Missing Anything

[jonbearman]

One thing the OP never mentioned was what he is using for powder,primer,make of brass. The other thing I want to know is if the douglas barrel comes from the factory or was it fitted by a competent smith. If the chamber is off center enough it will never shoot along with a sharp clean muzzle crown. Also could it have accumulated enough carbon just forward of where the neck ends in the chamber. This has to be cleaned carefully and checked with a borescope.

 

[370bc]

I performed an OCW test at 200 yards with a 6.5-20x40mm leupold vari 3 with fine crosshairs and with a new depth testing going .010'' off the lands and found what I think are satisfactory results so far. The art of defining the exact proper load from these tests is something I don't have a lot of experience in. I would post target pics, but that art is also elusive for me.
I came up with two loads that are in the center of the node. (I think). One grouped 5/8'' wide x 1/4'' high for 5 shots. (47.1 H4350 going .010'' off the lands with 70 grain TNT's.
The other is 1/4'' wide x 5/8'' high for 4 shots ( 42.5 of H-100v with 88 bergers .010'' off lands). The last grouped was with only with 4 different loadings tested. The first was tested with 7 different loads. I am tempted to put my 4.5-14x30mm leupold w/ b&c crosshairs back on and see if they will repeat.

 

[Tim Singleton]

5/8" at 200 yds is nothing to sneeze at. That's pretty good shooting

 

[BoydAllen]

+1

 

[Brians356]

One grouped 5/8'' wide x 1/4'' high for 5 shots. (47.1 H4350 going .010'' off the lands with 70 grain TNT's.
The other is 1/4'' wide x 5/8'' high for 4 shots ( 42.5 of H-100v with 88 bergers .010'' off lands).

Is this a marmot or coyote rig? If so, pick one of those bullets and loads, and go hunting!

If you want to try to refine his down to all holes touching or something, or take this to 600+ yard paper punching, I suggest you follow the approach outlined by Erik in his standing thread here (and posting the targets, as many have been doing, for analysis):

http://forum.accurateshooter.com/index.php?topic=3814361.0

 

[RegionRat]

I have to agree with the others... that type of group at 200 yards is nothing to wonder about.

I would suggest that if you are worried about getting even tighter groups, you may find yourself getting into a performance that borders on benchrest shooting instead of varmint shooting.

I find that there is no point in doing OCW tests at such close ranges. The results are too difficult to sort this close and further, they probably don't replicate at distance. Some projectiles can look one way at 100 or 200, then look really different out at 600. May I suggest setting a goal on the target size and hit probability for your maximum range and then doing your OCW work even a little farther than this distance. Finding your seating depth and cleaning regimen will take up some bbl life and I wouldn't waste time at 200 yards if I was going to be concerned with 600.

It sounds like the 200 yard work is really good and you should move on out to your maximum. Anything that does a reasonable number of rounds and holds less than 1 MOA out at distances past 300 yards is doing good enough to start worrying more about doping wind.

 

[M14AMU]

Praying might help!

 

[370bc]

test

 

[370bc]

Wow. I got er done!
My original pics are very clear. Getting them hear reduced the quality big time.

 

[370bc]

yote

 

[Brians356]

yote

I told ya that load was MOC*.

[* Minute Of Coyote]