Ok I went out today and shot 4 groups (full mag 19 shots) at 100 yards from a rest with my 2018 huben k1 in .22 caliber using the .2225 diameter, ~40.8 grain slugs that I swage myself using my Corbin s press. After I got home I disassembled my k1 and polished my barrel using JB non embedding compound then followed up with the JB bore bright. 90 strokes of each type in the 1st 3rd of the barrel starting at the breach, 60 strokes to 2nd 3rd of barrel and 30 for last 3rd. Here are pics of the groups before polishing.
Not particularly great right? Thats why im trying the polish. Tomorrow I will go out and shoot 4 more groups in the same fashion and hope for good results. If I don't get better groups at first, I will probably just shoot a bunch of rounds to lead the barrel and then compare again. I'll report the better groups of the two and also mention if I had to lead the barrel first or not to get them. sorry to keep you in suspense if you're reading this between now and then. If my groups improve i will also polish my .25 huben barrel. Fingers crossed...
Well, my results are disappointing. I am leaning toward saying it made no difference. It was significantly more windy today though, and it was gusting randomly. Here are some groups shot after firing just one mag to check for scope adjustment and velocity.
Very disappointing. Some are so bad it's hard to tell which shots are part of which group attempt. So I fired about 200 shots at other stuff to lead the barrel some. The 50 yard accuracy is still pretty good. After leading the barrel I shot these. This first one was with some of my old huben slugs which are 36.6 grains:
So I'm not too happy. Hopefully it just needs more leading of the barrel to see a difference but I fired over 300 shots today. I'd think if the wind was to blame but it was improved overall then what I'd see is more consistent elevation but some variance on the windage part, but they seem as random as before. It does seem like my velocities are more consistent and I think I needed slightly less reg pressure to achieve 925 fps so maybe there is some benefit, idk.
Well I wish I had better findings to report, I'll update this post if the groups get better next time.
Hey a late edit, I posted in a reply below but thought I should add it here too. Here is a group I shot using .2213 flat base AVS slugs at about 880 FPS @ 100 yards. Approaching what I consider acceptable although this was only an 10 shot group not a 19. I also forgot my rest that day and it was freezing cold. I rested the rifle on my arm at the table and tried to hold still as i could, so not bad considering that and how the groups were before. I've ordered a new flat base punch and sizer to modify mine to be similar. I may have to slow them down from 925 to 880ish as well, at least when I'm shooting at 100 yards
Not particularly great right? Thats why im trying the polish. Tomorrow I will go out and shoot 4 more groups in the same fashion and hope for good results. If I don't get better groups at first, I will probably just shoot a bunch of rounds to lead the barrel and then compare again. I'll report the better groups of the two and also mention if I had to lead the barrel first or not to get them. sorry to keep you in suspense if you're reading this between now and then. If my groups improve i will also polish my .25 huben barrel. Fingers crossed...
Well, my results are disappointing. I am leaning toward saying it made no difference. It was significantly more windy today though, and it was gusting randomly. Here are some groups shot after firing just one mag to check for scope adjustment and velocity.
Very disappointing. Some are so bad it's hard to tell which shots are part of which group attempt. So I fired about 200 shots at other stuff to lead the barrel some. The 50 yard accuracy is still pretty good. After leading the barrel I shot these. This first one was with some of my old huben slugs which are 36.6 grains:
So I'm not too happy. Hopefully it just needs more leading of the barrel to see a difference but I fired over 300 shots today. I'd think if the wind was to blame but it was improved overall then what I'd see is more consistent elevation but some variance on the windage part, but they seem as random as before. It does seem like my velocities are more consistent and I think I needed slightly less reg pressure to achieve 925 fps so maybe there is some benefit, idk.
Well I wish I had better findings to report, I'll update this post if the groups get better next time.
Hey a late edit, I posted in a reply below but thought I should add it here too. Here is a group I shot using .2213 flat base AVS slugs at about 880 FPS @ 100 yards. Approaching what I consider acceptable although this was only an 10 shot group not a 19. I also forgot my rest that day and it was freezing cold. I rested the rifle on my arm at the table and tried to hold still as i could, so not bad considering that and how the groups were before. I've ordered a new flat base punch and sizer to modify mine to be similar. I may have to slow them down from 925 to 880ish as well, at least when I'm shooting at 100 yards
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