I used to shoot 308 at long range almost exclusively. Recently switched to 243. Is it common to have to clean way more frequently in order to avoid velocity increases,resulting in POI shifts.
Range Report 6mm zero fluctuation
- Thread starter larrystine
- Start date
Not sure I can answer your question correctly, but I seem to need to clean every 6mm I have shot(many) way more than when I shot 6.5mm exclusively. I am not wise enough to say why.
BUT, I think powder selection plays the biggest part of it. Some powders foul the beginning of the barrel, some the muzzle end.
I have shot a 6 comp match with IMR 7977 and could go 400 rds between cleaning. A 6x47 with IMR 4451 and 300-350 normal.
Today I am shooting a lot of BR variants with H4895, Varget, and RL 16 and getting 250 rds between a cleaning would be a miracle. At the same time though, being as though I have 5 of them, it takes 2 months to get 200 rds down a barrel, so not a fair comparison. I think the longer you let carbon build up in a barrel, the harder it gets.
BUT, I think powder selection plays the biggest part of it. Some powders foul the beginning of the barrel, some the muzzle end.
I have shot a 6 comp match with IMR 7977 and could go 400 rds between cleaning. A 6x47 with IMR 4451 and 300-350 normal.
Today I am shooting a lot of BR variants with H4895, Varget, and RL 16 and getting 250 rds between a cleaning would be a miracle. At the same time though, being as though I have 5 of them, it takes 2 months to get 200 rds down a barrel, so not a fair comparison. I think the longer you let carbon build up in a barrel, the harder it gets.
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