Some load development that i did, mostly just speed
Quote:
ETA: Data from today loaded up rounds of all the bullets i had ran 2 over the chrono and shot the other 3 for "group". I also finished my pressure and velocity testing of the 85gr NBT
16" barrel H335 85gr NBT
26.3gr–– 2664fps avg
26.5gr––2688fps avg
––-No pressure signs whatsoever and fantastic accuracy from both. I will no focus on the 26gr-26.5gr area and do more development but i think i have found THE perfect load for my purposes as the above picture proves
––––––––––––––––––––––––––––––––––––––––––-
now the rest all loaded at 25gr of H335
sierra 75gr HP––––––––2587fps avg @20fps difference
sierra 90gr HP––––––––2559 AND 2560fps I will be working on this bullet and this charge
sierra 90BK––––––––––-2539avg also very promising 10fps difference between 2 shots
Hornady 75gr HP––––––––-no readings not sure what happened, shot like shit anyway
hornady 87gr SP––––––-2556fps another great result within 15fps
Hornady 90gr midway blems tips cut––––––––-2576fps blasting ammo
All the rounds shot well except the 75gr Hornadys. I was definitely the limiting factor for sure as we were using a hasty rest on a round bail.
testing paper at 100yds
75gr sierra HP 100yd (disregard writing lol) 6 shots black square is .5"
Seems like 25gr of H335 is a fantastic start point for 90gr and below bullets and is a damn sweet spot for most bullets IMO.
I will def be working up the 75gr sierras because they shoot as well as the 85gr NBT. Same with the sierra 90gr loads ill load up 20 of each run 10 over chrono and bench the other 10 and really get a good idea of where they fall in line.
|
Some more info
Quote:
With the 85gr bullets i have gone all the way to a compressed load, didnt shoot it .
I have decided my MAX charge is 26.5gr at 26.7gr with the 85gr bullets it becomes a compressed load.
I will be doing some testing with the sierra 75hp up to 27gr for sure. i really think the 75gr will be an awesome round for the ground hogs.
although the 85gr is no slouch
|
I never did get to doing up the 90gr bullets i did a little work on the sierras but nothing really in depth, I have since worked with the 75gr hornady HPs and they work well ill find the later posts...
Threaded Mode