Well, here is the deal on my tests with the 300 Win Mag Rem 700 Sendero. Factory ammo did not shoot well in the rifle, so I got into reloading. I like Nosler bullets, so I started with Nosler Load Data.
(1) 70 Grains of IMR4831 pushed a 168 grain NBT 2880. Much slower than the load data.
(2) 68 Grains of IMR4350 pushed the same bullet 2900, again, much slower than the load data.
(4) Even max load of IMR4350 with a 180 grain NBT pushed was 100fps below the load data.
(4) H1000 was much slower on the 180- grain NBT as well.
None of them shot all that great. The best one was the IMR4350 at max load with the 180 grain NBT. At the time, the only primers I could find were CCI250's. After doing some reading and research, the CCI250's, apparently, are not as "hot" as other brand primers. So, I finally found some Winchester WLRM's.
I know I shouldn't change but on thing at a time, but I switched primers and bullets: (1) to the WLRM's, and (2) to the AccuBond 165's. I tested IMR4350 at 71 grains, and it shot 1". I made a ladder of IMR4831 starting at 73 grains. 73 grains did not do well. 73.5 grains had three bullets touching in the center of a 1" circle and probably .75 or a little less. I put the rifle up after that because it was getting warm outside (longer for the rifle to cool off), and I will test the 74 grains of IMR4831 later. I also have 79 grains of H1000 to test in the 180 NBT's again as well. I don't have speeds with the WLRM primers yet. I used my buddies chronograph the weekend before last to test speeds. I'll have me a chrono soon though. I can't accurately compensate for bullet drop if I am guessing from the load data. The chrono will tell me for sure.
I doubt it had much to do with changing bullets from the NBT's to the Accubonds. I suspect the WLRM's do a better job in my rifle than the CCI250's. Everything tightened up when I switched primers.
What are your thoughts?
(1) 70 Grains of IMR4831 pushed a 168 grain NBT 2880. Much slower than the load data.
(2) 68 Grains of IMR4350 pushed the same bullet 2900, again, much slower than the load data.
(4) Even max load of IMR4350 with a 180 grain NBT pushed was 100fps below the load data.
(4) H1000 was much slower on the 180- grain NBT as well.
None of them shot all that great. The best one was the IMR4350 at max load with the 180 grain NBT. At the time, the only primers I could find were CCI250's. After doing some reading and research, the CCI250's, apparently, are not as "hot" as other brand primers. So, I finally found some Winchester WLRM's.
I know I shouldn't change but on thing at a time, but I switched primers and bullets: (1) to the WLRM's, and (2) to the AccuBond 165's. I tested IMR4350 at 71 grains, and it shot 1". I made a ladder of IMR4831 starting at 73 grains. 73 grains did not do well. 73.5 grains had three bullets touching in the center of a 1" circle and probably .75 or a little less. I put the rifle up after that because it was getting warm outside (longer for the rifle to cool off), and I will test the 74 grains of IMR4831 later. I also have 79 grains of H1000 to test in the 180 NBT's again as well. I don't have speeds with the WLRM primers yet. I used my buddies chronograph the weekend before last to test speeds. I'll have me a chrono soon though. I can't accurately compensate for bullet drop if I am guessing from the load data. The chrono will tell me for sure.
I doubt it had much to do with changing bullets from the NBT's to the Accubonds. I suspect the WLRM's do a better job in my rifle than the CCI250's. Everything tightened up when I switched primers.
What are your thoughts?
