Equipment & Gear > Guns and Ammo
Let's talk muzzle velocity....
jrebel:
Well after multiple attempts and lots of tweeking, I cannot get rl26 to stabilize the 150 grain partitions. Best groups I could produce were 1.5". Being that I have started this journey and also that my other 6.5 creedmoor is shooting so well, I have decided to work with a few more loads. Next will be 140 grain bullets (vld hunters and accubonds). I will update as my progress goes for others that are looking accurate .270 loads. Worst case scenario I go back to my 150 grain partitions at 2700 fps. :tup:
high country:
If they are not keyholing, stability isn't your problem. I'd be curious to know if your brass is anealed, and if you've tried big (.2") jumps. I bought 8lbs of 26 and fought it in my 270 until I understood that it builds pressure late so the ignition cycle is critical to get right. Consistent neck tension is paramount if the bullet cannot be jammed....ime.
CP:
--- Quote from: jrebel on May 16, 2017, 09:47:47 PM ---Well after multiple attempts and lots of tweeking, I cannot get rl26 to stabilize the 150 grain partitions. Best groups I could produce were 1.5". Being that I have started this journey and also that my other 6.5 creedmoor is shooting so well, I have decided to work with a few more loads. Next will be 140 grain bullets (vld hunters and accubonds). I will update as my progress goes for others that are looking accurate .270 loads. Worst case scenario I go back to my 150 grain partitions at 2700 fps. :tup:
--- End quote ---
1.5" is plenty accurate for a big game round.
jrebel:
Forgot to get out of archive mode so didn't get the first chrono. Here is a 5 shot group with 4 shot chrono using 51 grains H4350 and 140 grain burger VLD Hunting bullets. I think this load is a keeper. As for getting better velocities....well, my rifle just doesn't like speed, I guess.
Series 12 Shots: 4
Min 2774 Max 2791
Avg 2781 S-D 7.9
ES 17
Series Shot Speed
12 1 2774 ft/s
12 2 2785 ft/s
12 3 2776 ft/s
12 4 2791 ft/s
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Biggerhammer:
What barrel length? That's right on par with 7x57 velocities with the same weight bullet.