ok just an update here, the other day I decided to do another load work up to verify my max pressure because I have since turned all necks and did some extra brass prep since the last time I looked for max. well I started at 77.5gr h-1000 since I have recently worked with 77.0gr.
I loaded 5 rounds from 77.5gr-79.5gr and wen to the range just to find pressure. well at 79.5gr my bolt lift got real sticky and I had clear markings from the ejector on the case head. but what I did notice was that 77.5,78.0,78.5 all created a horizontal spread. kinda like you would see on a ladder test. by the way I was at 200yards. but I had no real pressure issue. could neck turning have helped with pressure? Well I went home and loaded 10 rounds at 78.0 and 78.5gr at a seating depth of .030 off the lands and raced back to the range. they both shot good but 78.5gr had better es with 10fps.
So I ran back home and loaded 10 more but this time I weight sorted the brass and picked 10pc that were within 1.0 grain of each other, I trickled each charge, I feel my ammo was good. so this morning I found myself back at the range. group 1 at 100yards was ok at just under an inch, the es was still 10 so I was impressed. after letting the barrel cool I shot a second group. to my surprise my sd/es were all under 10, I mean what has happened for such a change and the 3 shot group measure .4.
I am still blown away by that, really I am. so I went home loaded some more and went out tonight and shot at 500 yards. I took 2 3shot groups letting barrel cool for maybe 10 minute. All shot were fired at the same target. the first shot was about 2.5" high left followed by the next two within 3.25" from each other. On the second group all three shots formed a perfect 3.5" group grouping with the second and third shot from the first group.
if it weren't for that flyer in the first group that 6 shot group would've rocked!! I didn't thing I pulled that first shot but who knows now. the group measure just over 5'' with the flyer.
I really happy things are looking on the up, but I still want to load a few more and confirm, oh I for got to mention that the vertical dispersion not including the fler was right at 2.5". my velocity average is 2938fps. Is there anything else you guys can think of that may give me and edge continuing my accuracy with this load if the flyers persist. I do believe I will shop for new brass because after weighing all my ww brass I am shock at the difference in weight with some being upto 4 grains diff,
thanks guys for all your input over last few days, youe experiences have helped me so much
