I tested dozens of bore cleaners, spent hundreds of $. It came down to 10-15 strokes of a bronze brush soaked with Flitz LIQUID polish followed by dry patches until clean. I follow this with a wet patch of EEZOX, let that soak 30 minutes and dry patch. EEZOX is an awesome rust preventive. Every...
My Barnes #4 manual doesnt show the 145 LRX but the max load for the 140 gr with H4831SC is 55.0 gr and 57 gr of Reloder 22 is shown as max in standard 280 Rem
RL-22 and H4831 shot best in my 280AI with 145 LRX
RL-26 is a dense powder so more can be fit in the cases. It drives 100 gr over 3300 on my 257ai and no pressure signs at all. Just happened to hit a sweet node at 3325. The burn speed was too slow to work in my 250 ai though but RL-16 worked great hitting a node at 3050 and no pressure signs...
Could it be a neck tension variation? Has the brass been annealed? I had a similar problem so I annealed and it improved a lot. I then tried removing the expander ball from my die and ran the cases over an expander mandrel and the problem disappeared.
Interesting. I get accuracy under .5 and single digit numbers in my 250ai which is similar to the CM. Hard to beat H4350 in CM anyway. My son has a 6.5CM and his shoots .1 with RL-16. Every rifle has its own personality.
RL-26 and 16 both have decoppering agents and in my rifles using barnes bullets i get zero copper with a dry bore and minimal carbon. After I clean, I wet a patch with EEzox, run it thru, let it sit 30 minutes and dry patch out and then dry patch chamber. No rust and no oil
Could be a number of things. Is your barrel longer than their test barrels? Do you have 5R rifling, brass, etc. If you dont have any pressure signs, I wouldnt be concerned as your rifle is different than the test rifles. Hodgdon data seems a bit conservative too. Every rifle is different.
Never tried the Staball but ball powders and double base powders in general are quite temp sensitive. During testing in my 243ai using H-414 I got HUGE pressure spikes and loads were just too unpredictable so I scrapped it and havent used it since. Another powder you might want to try is Reloder...
I contacted CCI about a week ago asking where all the primers were, thinking maybe they had shutdown over the virus and was told they were working 24/7. Someone buying them up. I recall a guy on another forum saying he had bought 8000.