I really appreciate you paving the way with this new powder. Just finished sizing new 6.5 Lapua brass to 6 . What primers are you using ? I've been using CCI LR . Seating depth I'll start out with what I seat the Sierra 107s at. Do you neck turn your brass ?
How does it profit a man if he gains the whole world but loses his soul?
I got some rl33 today at the local shop....
time to break out the chrono and big toys.
I'm going to work over the 30 rum with 190 and 225 grain slugs
and the 7stw with 140 and 171 grain slugs.
posting results when done....
Anyone have any Ultra mag results or weatherby results, especially, 300 RUM, 338 RUM ,30-378,338-378, 338 Lapua I think thats were it will really shine since that what it was developed for. I would really like to see what it will do with a 300 rum and 230 gr bergers.
300 RUM results? Wasn't going to do it this close to the hunting season but got restless.
Had a okay load with H1000 and Berger 230 gr target hybrid. Used 88.5 gr for vel of 2860 fps. Load is close to max.
The barrel was a 24" rem takeoff in 300 win mag. I machined it to fit a push feed model 70 and used a PTG reamer.
Used the same components with same seating depth just substituted RL-33. Started with 90 gr and worked up. Temperatures were 85-90 degrees. Here are the results so far:
94gr no reading cardboard shades moved had to wait for next ceasefire to adjust
98 gr 2925
No signs of pressure, no bolt lift issues, primers look good etc. Will start when range opens and temps are in the low 50s. Will chrono the 100 gr load again for comparison.
I went out again today to continue the 300 RUM testing with RL-33 and the 230 Berger target hybrid:
Shot the 100 gr load this morning in 60-70 degree weather. The average velocity for four shots was 2975 fps. This compares pretty close to yesterday's two shots averaging 3001 at 85-90 degrees. Will need more rounds to conclude if the powder is temp sensitive as well as cooler mornings. Az just won't cooperate with cooler weather yet.
Continued with more powder:
101 grs 2983 fps This is the first increase that didn't show a 50-70 fps increase in velocity. It would appear that there is nothing more to gain by increasing charges
102 grs 3016 had a tiny amount of bolt lift resistance.
Didn't try any hotter loads.
For my rifle 100 gr is the max I'll shoot. It was the most accurate too.
Went to the Tucson Rifle Club this morning to test the calculated comeups for 2550 elev and 60 degrees for 300 M (328 yds) and 500 M (546 yds). We have a steel silhouette range there. It is great fun to drive to the steel and spray paint them then go back and make them talk. I was very impressed with the results. I twisted the turret for the 300 M javelina hit it once. Then twisted for the 500 M ram again with exact bullet placement for elevation and windage. It is ready to hunt.