Range trip today hoping to accomplish several things,
1. First shoot some more 105 to get 1x brass. Check groupings
2. 2 ladder tests of 103 Eldx, with CFE and with 2520.
3. I had some time left so did some "load-'em, measure, auto-feed, measure, and shoot... looking to measure any set-forward of a chg handle- chambering, and of a full cycle load after firing- chambering.
Got all of these done!
1. More shooting, I use 3-shot groups, those groups ranged from 0.73" to 1.4" ctc, average of 5, 3-shot groups 1.075". Now as I watched POA and POI during the shots I can say most of the wider strays were my own wiggle, or tiring eye. This barrel is a definite 1"/100 yd shooter as long as I can keep steady. That's with these factory 105's. So now I have some 1x, and 2x, brass. I will attach a pic, groups 2-3 on top, 4-6 in middle, left to right: #2-3: 1.031, 1.404. #4-6, 1.133, 0.732, 1.076
2. Ladders: I loaded 103 Eldx to 2.260 with CFE223 and AA2520, both at 0.5 gr steps. The Cfe went 27.0-29.5, the 2520 went 26.5-28.5
27.0 - 2469
27.5 - 2522
28.0 - 2552
28.5 - 2609
29.0 - 2657
29.5 - 2701
2520:
26.5 - 2509
27.0 - 2549
27.5 - 2607
28.0 - 2633
28.5 - 2678
All brass looked good, primers a little flattened but nothing I haven't seen before. Like I posted earlier none of these loads were compressed, they were all at or above the shoulder line but none into the neck.
Finally, I took 3 105 rounds at random and measured them at 3 stages: out of box,
after a chg-handle load (like the first one would be), then extract and measure. Last, fire one, let the second load, then extract and measure (this step only for the last 2)
results: no rounds extended more than 0.001 at any time, they all pretty much followed a pattern, 0 (original), +0.001, +0.0005:
1 -- 2.247, 2.248
2 -- 2.249, 2.250, 2.2505
3 -- 2.252, 2.253, 2.2535
All of them fed smoothly and also extracted smoothly via the charging handle, into my brass catcher.
here is a pic from today.
1. First shoot some more 105 to get 1x brass. Check groupings
2. 2 ladder tests of 103 Eldx, with CFE and with 2520.
3. I had some time left so did some "load-'em, measure, auto-feed, measure, and shoot... looking to measure any set-forward of a chg handle- chambering, and of a full cycle load after firing- chambering.
Got all of these done!
1. More shooting, I use 3-shot groups, those groups ranged from 0.73" to 1.4" ctc, average of 5, 3-shot groups 1.075". Now as I watched POA and POI during the shots I can say most of the wider strays were my own wiggle, or tiring eye. This barrel is a definite 1"/100 yd shooter as long as I can keep steady. That's with these factory 105's. So now I have some 1x, and 2x, brass. I will attach a pic, groups 2-3 on top, 4-6 in middle, left to right: #2-3: 1.031, 1.404. #4-6, 1.133, 0.732, 1.076
2. Ladders: I loaded 103 Eldx to 2.260 with CFE223 and AA2520, both at 0.5 gr steps. The Cfe went 27.0-29.5, the 2520 went 26.5-28.5
27.0 - 2469
27.5 - 2522
28.0 - 2552
28.5 - 2609
29.0 - 2657
29.5 - 2701
2520:
26.5 - 2509
27.0 - 2549
27.5 - 2607
28.0 - 2633
28.5 - 2678
All brass looked good, primers a little flattened but nothing I haven't seen before. Like I posted earlier none of these loads were compressed, they were all at or above the shoulder line but none into the neck.
Finally, I took 3 105 rounds at random and measured them at 3 stages: out of box,
after a chg-handle load (like the first one would be), then extract and measure. Last, fire one, let the second load, then extract and measure (this step only for the last 2)
results: no rounds extended more than 0.001 at any time, they all pretty much followed a pattern, 0 (original), +0.001, +0.0005:
1 -- 2.247, 2.248
2 -- 2.249, 2.250, 2.2505
3 -- 2.252, 2.253, 2.2535
All of them fed smoothly and also extracted smoothly via the charging handle, into my brass catcher.
here is a pic from today.