what happens when you turn your liner/barrel?

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I don't think liner index will make it any more accurate. Turning the liner only change the poi. It can be due to many reasons. What I think why it change poi is cause these barrel or liner are not perfectly straight. The only look straight to our eyes but even .01mm off it will change poi. Another reason would be when you turn the liner, it change where the pellet starts to twist. So it will change poi. Another reason is when you index the liner it change the harmonic, which also change poi. Probably more reason why it change poi. But the main reason I believe is due to the barrel/liner I not perfectly straight.
 
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Haven't watched your video but have been experimenting with indexing the Raptor barrel. The first two places in the rotation that I tried, made the main two pellets I want to shoot out of the gun group about 1.5 inches away, horizontally, with one pellets group also being slightly higher. The current location makes both group at the same place. 30 yard zero. Very convenient when different pellets will maintain the same zero. Makes me wonder if this is the simple reason why different pellets often shoot to a different spot from a given gun/barrel. 

Current location also seems to be producing the tightest groups.
 
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Perhaps the highest POI with the barrel location is not necessary the best spot, but maybe the tightest group is the best position. We all shoot differently, so one method may not suit all. you just to experiment and find out for yourself.
Click to expand...

You would be more accurate to go with the tightest group size, rather than the highest POI. To raise the scope for highest POI you can use adjustable rings or 20 MOA mounts. I like Burris XTR Signature rings as they allow the fine tuning of MOA before moving crosshairs off their optical center.
 
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Disclaimer: I know nothing. That being said, I would think that POIs that are horizontal are more likely to have a bigger spread because gravity only affects the elevation. When the barrel is indexed (or clocked) to cause the spread to be vertical, my thought is that gravity would tend to tighten up the group.

Once my Raptor comes in, I'll find out.
 
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Max, thanks for posting this. Perfect timing as I was going to go thru the final sight in of my wildcat 25 cal MK2 today. CHUCK had explained all of this in detail to me, but I’m a visual guy and your video helped. Indeed it was an interesting test. I was getting accurate, but clover leaf groups, and I wanted to at least see more if not all shots being hole in hole. I understand pulling the shot, and I know when I do that. So today I went thru your procedure, and here’s a pic-



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12:00 was the start, and you can see at top left target I’m just to the left of the bullls. Rotated it to 3:00 and the group got better, and that’s it to the right, just outside of the top left target. Rotated it to 6, and the V shaped cut at the very top of the top right target shows it. Finally at 9 I hit the V shaped cut above the top left target.

rotated it back to 3, aim point is the bullseye at bottom left, and that big hole at the bottom is three shots. Weird how it would now appear there, lol



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After a bit of fiddling around, I am stopping with this as my final sight in, 40 yards, 8 shots total, or one mag. So I’m good. It was a good learning experience, and among other things I learned was just how a bit of a change on the barrel shroud affects accuracy. In your video you shot without the shroud, while I replaced mine along with the moderator at every test. After I was all sighted in I installed the typical 1/2-20 adapter that’s about 2” long, and changed out my Hugget end to 1/2-20 to now thread onto the shroud, whereas before I had the FX thread end cap on my Hugget and threaded that only to the shroud, making the barrel more compact. My shots were a bit spread out, and almost two inches higher with that extra length adapter. I didn’t think that would’ve affected POI that much. 



Anyway, I’m all good, and just wanted to say thank you.
 
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@bigragu. I am glad you find the video useful. I am just passing on information I learned from AGN to fellow members so we can all share and learn together. Good grouping you got there. Yes the LDC will change the POI somewhat, but as long as your barrel is in the right location where it is shooting the best group then all is good. you just need to fine tune with your turrets to make the adjustments.

cheers everyone and happy new year!
 
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