I had to take a flight to Texas, so I didn’t have very much time to test other things. I live in Illinois. It’s cooled off to about 60* ambient temp, 35% humidity. I have a new 6.5cm barrel in an AXSR, running Berger 153s in lapua cases with BR4 primers and h4350 @2650 FPS. On the end I’m running a TBAC 338 ultra gen 2. (Super stupid quiet BTW)
I missed a coyote the other evening at 350 yards, and I scratched my head for a long time about it. Yesterday, after work I went out and re, checked zero. It was slightly off, no big issue. Re-zero and starting hitting steel from 300-800yards. Then, after roughly 10 rounds I have moderately heavy bolt lift, groups opened up big time again. We’re talking can’t hardly hit a full ipsc at 700. Take it back to 100 yds, groups are 2 moa, and hitting low. I’m like dude wtf, took it inside, ran a borescope. All looks normal, except the last 6-8” of barrel is soaked. Wet. This barrel has exactly 200 rounds down it, never been touched nor cleaned, absolutely no reason anything should be wet. So I ran the borescope down the suppressor, it’s pretty damp looking too.
So I ran a dry patch through it. Came out wet looking, ran a few more, got it all out.
I thought I was going f-ing nuts so I took it back out and shot it. Same thing. About 10-15 rounds later, somewhat of a heavy bolt lift, I run the borescope through it and there it is, more moisture near the end of the barrel.
I was going to go shoot it without the can and see what happens but I didn’t have the time last night.
It is very dew’ey in the evening and morning here, so by 6pm the grass is soaking wet. So just because the humidity isn’t terrible -30-45%, there is a lot of Dew.
Here is a pic of the SR brake that is wet, and a pic of the first patch I ran through the barrel, wet aswell.
I missed a coyote the other evening at 350 yards, and I scratched my head for a long time about it. Yesterday, after work I went out and re, checked zero. It was slightly off, no big issue. Re-zero and starting hitting steel from 300-800yards. Then, after roughly 10 rounds I have moderately heavy bolt lift, groups opened up big time again. We’re talking can’t hardly hit a full ipsc at 700. Take it back to 100 yds, groups are 2 moa, and hitting low. I’m like dude wtf, took it inside, ran a borescope. All looks normal, except the last 6-8” of barrel is soaked. Wet. This barrel has exactly 200 rounds down it, never been touched nor cleaned, absolutely no reason anything should be wet. So I ran the borescope down the suppressor, it’s pretty damp looking too.
So I ran a dry patch through it. Came out wet looking, ran a few more, got it all out.
I thought I was going f-ing nuts so I took it back out and shot it. Same thing. About 10-15 rounds later, somewhat of a heavy bolt lift, I run the borescope through it and there it is, more moisture near the end of the barrel.
I was going to go shoot it without the can and see what happens but I didn’t have the time last night.
It is very dew’ey in the evening and morning here, so by 6pm the grass is soaking wet. So just because the humidity isn’t terrible -30-45%, there is a lot of Dew.
Here is a pic of the SR brake that is wet, and a pic of the first patch I ran through the barrel, wet aswell.
