Just completed a deep cleaning of chamber and bore in my father's 6GT... I understand the barrel now needs to be "fouled in"...in the meantime, should I expect erratic groups, erratic velocity, or both? Thanks
Precision or velocity?
- Thread starter Jspeed
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Generally, your group and shot placement will suffer for a few rounds. Most of my bores settle down in 2-4 shots. Then resume as before.
Wolf76
Well-Known Member
This has been hashed out many times. You have 2 groups of people. People that hunt/shoot clean barrels and others that hunt/shoot with fouled barrels.
IME... factory barrels almost always need to be fouled to group well. Even many custom barrels need this as well. There are a few that are fairly insensitive to being clean or fouled.
You'll need to shoot the gun to determine how it likes to perform.
Most of my guns take 6-12 shots before they bughole again after a deep clean.
IME... factory barrels almost always need to be fouled to group well. Even many custom barrels need this as well. There are a few that are fairly insensitive to being clean or fouled.
You'll need to shoot the gun to determine how it likes to perform.
Most of my guns take 6-12 shots before they bughole again after a deep clean.
If I'm understanding this correctly, it's the velocity that may or may not be affected....and any poor groupings would simply be a direct result of poor ES? All else equal, of course.
Assuming you are shooting 100 yds, variance in ES doesn't have a huge effect. Bench guns shoot bugholes with surprising ESs. I think it's more about getting the bore smoothed back out.
I was just planning on shooting a couple of groups of five rounds over a chronograph this morning...gonna shoot to at least 300, maybe as far as 500....trying to wrap up load development on this gun and just didn't know if my results would be reliable...
My suggestion would be stick to 300 to start. Shoot a couple of groups. See if the grouping settles down - assuming you have a known good load. Once the barrel settles down, go on to 500.
That looks about right. On my rifles, most put the first 1 or 2 just out of the group, then start hammering (after scrubbing the bore). One of my rifles takes 4-6 shots to calm back down?
In my experience POI changes a bit and I never start a match or hunt with a clean barrel, ever. Five shots for me to foul a barrel.
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Factory Sako 6ppc I once had - should never have sold it - would make about 100 rounds before groups started opening up. After a dose of Sweet's, about 2 shots was all that was needed to be back "right".
