Update on .263 PPU 156 RNs. Tried them today for first time. 98 degrees no wind. At 100 yds. with 35.2 gr of 4064. 6 0'clock hold on 12" bull. First three shots centered 4&1/2" low of center of bull with std. 300 yd. battle sight. Raised sight to 400 and next five shots were centered an inch above center of bull. 1.6" circular group. Minimal recoil, around 2300fps. based on Hodgdon info. Should be a decent 100 yard load.
Sounds like you are not running the "300 yd (actually meter) battle sight", but you are running your +2 front sight you were talking about in another thread. Correct me if I'm wrong, but an actual original 300 meter battle sight would put you about 11" high on the target (+/- 2") BTDT. You are shooting low if you want to keep that 6'oclock hold and be in the x-ring. Like I said in a different thread, the +1.5 works very well in that regard. While shooting at a recent militarry rifle shoot, I managed to keep them all in the 10 ring and a few in the x-ring with the +1.5 front post. For chits and giggles I ran the 129gr Hornady interlock in one of the matches and as luck would have it, the loads I ran all printed into the same poi. The 129gr SP interlock is a good bullet, but there are much better bullets out there for shooting tight groups. The other bullets I used were the 140gr Sierra, 140 ELDM and 140 Barnes match burners. All exceptional shooting bullets in my old Swede. If you want to hunt and practice with the 129gr sp interlock, it is great for that. Keep us posted on your results. The swede is a cool old rifle and the 6.5x55 very inherently accurate.