Re: 338 Rum load development
I got a chance to load some more and headed to the range today and shot only at 300. Nothing shot very well, with the exception of pulling some bullets from the factory federals, neck sizing and seating the bullets out to my max magazine length. These shot about 3 inches. I put both of my chonographs in line for the shots and found that there is about a 60 fps difference between my pro chrono and my new chrony, with the chrony reading faster.
This barrel only has about 200 rounds down the pipe, and is a great barrel, but the new variable is the new stock. It is full length pillar bedded and I free floated the barrel, I checked it again today and I can slip a piece of paper down the length of the barrel channel. I didn't check the toque on the action screws yet, but I will.
I didn't try any loads with 4350 today, just the h-1000 and rl 25. Velocitities were averaging between 3200 and 3250. I did clean my barrel before shooting today and it is soaking again now for the next set of tests. I am not really sure why the groups opened up so much going from 100 to 300 yards.
I am not seating out as far as Tarey, because I want loads that will fit in my magazine.
When I installed my new stock, all I did was relieve the barrel channel to remove any pressure, and torque the action screws. Is there anything else I should address as far as the bedding?
After pulling bullets from the factory federal loads, I weighed the powder charge and they have 91 grains of powder, I wonder if the powder is h-4831sc, but I don't have any to compare too.
My loads are all using cci 250 primers, some were with federal nickle brass and others were with remington brass, each set of loads was specific however. Kind of scratching my head right now, thinking I will make sure the barrel is very clean and then try some more loads with faster powder like Tarey did.
Remington model 700 300 RUM LH 26" rem ss/blued receiver lam stock 215 Berger @3070/180 NAB @3300/Leupold 6.5-20x50
Remington model 700 338 RUM LH 26" Bartlein 5C #4 Muscle Brake, blueprinted action, sako extractor, jewell trigger, bell and carlson Alaskan stock/Black cera coat/Sightron SIII 8-32x56 moa reticle, external elevation turret
Savage LH 22-250/Sightron 4-16