7.5x55 Reloads - Date with the Chrony=Pics Added!

dcloco

Made a quick trip to the range this afternoon.

Fired a 10 round string of GP11 ammo with the following chrony results

2535
2544
2531
2547
2542
2503
2554
2559
2455
2530

Working up a couple loads using 284 Win brass with Hornady 168 gr BTHP and 150 gr RN. No signs of pressure in any of the reloads. All of the bullets were seated 0.020" off the lands.

Hodgdon H4895 & 168 BTHP
The grouping is under 3" @ 100 yards using open sights with bags on the bench.


42.8 2626 2670
43.0 2622 2620
43.2 2636 2646
43.4 2662 2681
43.6 2679 2690
43.8 2678 2685
44.0 2687 2691
44.2 2706 2705
44.4 2733 2726
44.6 2726 2725
44.8 2770
45.0 2730

IMR 4350 & 150 RN
Groups were shot in strings of 5. All but one is under 2.5" @ 100 yards.

48.0 2380
48.2 2331
48.4 2359
48.6 2418
48.8 2377
49.0 2426
49.2 2419
49.4 2422
49.6 2476
49.8 2459
50.0 2501
50.2 2512
50.4 2477
50.6 2520
50.8 2523
51.0 2546
51.2 2557
51.4 2552
51.6 2601
51.8 2568

dcloco

Of note, the 168 BTHP, were one inch high at 100 yards. The 150 RN's, well, about 14" high at 100 yards.

dcloco

5 shot group, standard sights, 100 yards. 168 gr, Hornady HPBT, and Hodgdon H4895 powder. Working up a load, so the charge weight varied 0.2 grains per round 43.8 to 44.6.




Next pic, exact same load as above, 2nd group of five, #11 to 15 shots out of the barrel.




Next pic, middle five of same load. 42.8 to 43.6 grains of H4895.




Last group, IMR4350, Hornady round nose 150 grain. Yes, I definitely pulled one shot! 51.0 to 51.8 (started at 48.0). Unfortunately, the first three groups 1-5, 6-10, & 11-15 were not on the paper, this combination shoots 12" high from point of aim. ARGH!

rovernut

Thanks for the range report dcloco, iron sight K-31 I assume? The 150 and 168 really group far apart, can't remember seeing anything in .308 that far apart befor.

dcloco

Iron sights yes.

Two different flavors of powder, in varying amounts while working up a load.

sandwarrior

Dcloco,

You have to admit that those are one 'naturally accurate' rifle! Nice shooting by the way!

It floors me what I paid for one that shoots that well... with open sights even. I laugh every time I do that well. Good luck with the competition this year. This looks like it will be a good one for you.

dcloco

I have one or two more loads to work up...then adjust the front site if needed...and go from there.

These will hang with either of my 6.5x55 Swedes.

IMHO, the Swiss K31's have THE BEST MILITARY trigger out there. Two stage, but wow....very nice, smooth, and relatively light.