Thread: Another 260 Improved

Well a few months have passed and I've fire formed all my cases and got around to loading up some sample full power rounds with 3 different projectiles. I do like the 129gr LRAB's so I poked a few of these down the tube along with 123gr Amax & some 140gr Amax just to see what speed I could attain.
All loads were with RL17 & CCI 200 primers.
Our local range is still out of action, so I had to visit a different location and had to put up with shooting over the bonnet of the truck at a range of 122m, less than ideal for accuracy. I also had the Magnetospeed hanging off the end for all shots.

All bullets shot pretty well and I'm sure I will do better when I get on the bench.
I got very light ejector marks on my max loads with each projectile listed below.

123gr Amax 45.5g = 3097 fps average for 3 shots
129gr LRAB 45.5g = 3099 fps average with an ES 7 (woohoo)
140gr Amax 44.5g= 2961 fps average. 44g was a nice load @ 2938 av and an ES 6, but I wrecked the group with a pulled shot.
So I'm fortunate that this barrel seems to like all and the speeds are good. Next plan is to lengthen the throat on this chambering by about 4mm to make use of the long action and get those projectiles out of the powder space.

Couple of pix of the targets


And yes another bloody Tikka T3