Looking for feedback

[Sniper260]

260 Tac chamber - 140gr berger VLD Target - 42.0gr H4350 - Lapua brass - Federal Match Primer

28 inch 1:8 twist Brux barrel

95 degrees F ambient air temp in shade at Point of Fire
28% Humidity
961 ft Altitude

Shot 1 - 2926 fps
Shot 2 - 2985 fps
Shot 3 - 2973 fps
Shot 4 - 2979 fps
Shot 5 - 2977 fps

I gave a good amount of time in between shots and checked the ammo temp and chamber temp with a laser thermometer between shots to only shoot the next shot once everything cooled back down to the same stable temp for "more better" results.

What do yall think? First shot was "cold bore" I let the ammo and rifle sit in the shade there for 30 min or so to adjust to the ambient air temp as well. I wasnt expecting higher 2900's though! I was expecting 2800's but this looks like good news, I am happy if it shoots this speed.

Most people have a 26 inch barrel - Do yall think these 2 extra inches in barrel make that extra 100 fps faster? is that what I am seeing here?

This was the "pet load" that I worked up... it's shooting really really well. It's not a max load, but any faster groups started opening up, then I went to max load around 44gr and started getting a sticky bolt... so this is right about where I stand with this rifle as of now..

 

[Victor N TN]

Trying to get a smaller Standard Deviation can just about drive you crazy. Try uniforming your primer pockets, reaming the flash holes, clean the inside your case necks with a brass / bronze bore brush mounted in a screwdriver handle, then weigh each powder charge. If you're using magnum primers you might want to step down to regular primers. Mag primers seem to cause more SD than other primers.

I hope this helps,
Victor

 

[Sniper260]

Trying to get a smaller Standard Deviation can just about drive you crazy. Try uniforming your primer pockets, reaming the flash holes, clean the inside your case necks with a brass / bronze bore brush mounted in a screwdriver handle, then weigh each powder charge. If you're using magnum primers you might want to step down to regular primers. Mag primers seem to cause more SD than other primers.

I hope this helps,
Victor

Im not worried about the SD. They shoot good.... the velocity is what spiked my interest because its more along the lines of a 6.5x284... its speedy..