Sudden velocity drop

[Rev]

How many rounds on the barrel? I went Through something similar recently and it was just a bad barrel blank, luckily we found it out pretty quick before I wasted a lot of components trying to make it shoot. Bad barrel is probally the least likely things but there’s a lot of things that can cause velocity drops. How long as it been since it was cleaned? Carbon deposits and build up can cause velocity jumps and drops because it directly effects the gasses/ pressures In the barrel. If it’s a newer barrel clean it a few times and try again. Also coulda just been a bad load, I’ve had those a few times. First thing would be to run a patch or two down it and load up and try again just to confirm. I’m not familiar with that particular chrono graph but I’d look at it too, maybe try to get another one to double check against. Hope it helps,
Rev.

[Nick LD]

How many rounds on the barrel? I went Through something similar recently and it was just a bad barrel blank, luckily we found it out pretty quick before I wasted a lot of components trying to make it shoot. Bad barrel is probally the least likely things but there’s a lot of things that can cause velocity drops. How long as it been since it was cleaned? Carbon deposits and build up can cause velocity jumps and drops because it directly effects the gasses/ pressures In the barrel. If it’s a newer barrel clean it a few times and try again. Also coulda just been a bad load, I’ve had those a few times. First thing would be to run a patch or two down it and load up and try again just to confirm. I’m not familiar with that particular chrono graph but I’d look at it too, maybe try to get another one to double check against. Hope it helps,
Rev.

It's a pretty new Marlin 1895 SBL. Have about 100 rounds down the tube. I clean it after I shoot it but admit that I probably could do a better job cleaning the barrel. I have been thinking about getting a new chronny, I get alot of errors.

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