Do I Need to Index Barrel with Ernest Rowes Carbon Fiber Sleeves

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Al_Miller

Member
Dec 23, 2020
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Kansas, United States
I’ve been shooting paper with my wildcat mk3 compact at 50 yards and under for a couple weeks now. Its been shooting great. i finally had a calm day to stretch it to 100 yards. There was a VERY light left to right breeze that day and I noticed that it pushed my group half a mil to the right. No big deal (i thought) and was rather impressed. Then later that evening I went back out. There was zero wind, I mean nothing. I aimed at the left side where the target met the cardboard. My shots still grouped half a mil to the right of where I was aiming. My first thought was rifle cant but I verified I was level. I started researching barrel indexing and realized this sounds like my problem. I just purchased Ernest rowes CF barrel sleeve for my wildcat. Will this sleeve fix the need for indexing or will I have to index WITH the sleeve to fix/improve the poi change? If I have to do it with the sleeve then I’ll wait to index till I receive the sleeve. 


thanks
 
My Impact groups slightly right at 100yrds with slugs and I have a CF sleeve on my liner. I just tuned it last night after getting it all back together. As you can see by the first shot on the right spinner that my StrelokPro is off also. Once I adjusted for elevation it still favored the right. Then I shot at the little 1” spinner and it was still right. Once I held left almost a half mil, I smacked the little spinner twice dead center. I have other guns that favor the right at 100+ yards so that’s just how I hold. Accuracy is not an issue. I didn’t know that indexing my liner could possibly fix this. I always thought you just indexed a liner to see at what point it produces the best groups.
A3B6E3E1-E6E6-4138-948A-5F4DEEAB961E.1610642086.jpeg

 
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Vetmx as I understand it will not fix the problem but it will change it from a horizontal poi change to a vertical poi change. Imo a vertical change will be easier to deal with than a horizontal change as finding the correct windage hold is difficult enough. 

Heres a pic that shows what my indexing test did at 28 yards. Shooting at the center bull for all shots. Group one was the first 3 shot group. Then I rotated the barrel 90 degrees left to right and got group 2. I repeated the process and you can see the corresponding groups. I settled on the halfway position between 2 and 3 which is group 5. It was the most centered group and the poi was high. You can also see my new zero with the new index position. 

20210114_114604.1610649204.jpg

 
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My Impact groups slightly right at 100yrds with slugs and I have a CF sleeve on my liner. I just tuned it last night after getting it all back together. As you can see by the first shot on the right spinner that my StrelokPro is off also. Once I adjusted for elevation it still favored the right. Then I shot at the little 1” spinner and it was still right. Once I held left almost a half mil, I smacked the little spinner twice dead center. I have other guns that favor the right at 100+ yards so that’s just how I hold. Accuracy is not an issue. I didn’t know that indexing my liner could possibly fix this. I always thought you just indexed a liner to see at what point it produces the best groups.
A3B6E3E1-E6E6-4138-948A-5F4DEEAB961E.1610642086.jpeg
Click to expand...

Are you holding over or dialing the turret to get to the 100 yard range? Either way, the issue may be scope cant, in as far as how it is mounted on the rail, and it's relationship to the end if the bore. Rotating it in the mounts slightly will move the reticle lines and therefore move the point if impact at long ranges when using the hold over reticle. The bubble level, if attached to the scope tube and aligned with the cross hairs, will not need to be messed with.
 
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I’ve been shooting paper with my wildcat mk3 compact at 50 yards and under for a couple weeks now. Its been shooting great. i finally had a calm day to stretch it to 100 yards. There was a VERY light left to right breeze that day and I noticed that it pushed my group half a mil to the right. No big deal (i thought) and was rather impressed. Then later that evening I went back out. There was zero wind, I mean nothing. I aimed at the left side where the target met the cardboard. My shots still grouped half a mil to the right of where I was aiming. My first thought was rifle cant but I verified I was level. I started researching barrel indexing and realized this sounds like my problem. I just purchased Ernest rowes CF barrel sleeve for my wildcat. Will this sleeve fix the need for indexing or will I have to index WITH the sleeve to fix/improve the poi change? If I have to do it with the sleeve then I’ll wait to index till I receive the sleeve. 


thanks
Click to expand...

If the scope is not directly over the bore, and you are holding over to reach out to 100 yards it will be due to either a zero needing fine tuned or due to scope cant. 

Once that carbon sleeve is epoxied onto the liner and cured I would do an indexing test to get it straight with the optical center of the scope. And check for group size there as well.

Screenshot_20210114-182336.1610666699.png

 
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The sleeve only cover the outer liner. The inner liner is what spin the pellet. So yes you will still need to index it.
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That would depend if hes talking about sleeve that goes onto the liner or sleeve that goes over the barrel house.

I think he means the one that goes onto the liner.
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Yeah I was talking about the sleeve that goes on the actual liner not the barrel tensioner. 

I’ve been shooting paper with my wildcat mk3 compact at 50 yards and under for a couple weeks now. Its been shooting great. i finally had a calm day to stretch it to 100 yards. There was a VERY light left to right breeze that day and I noticed that it pushed my group half a mil to the right. No big deal (i thought) and was rather impressed. Then later that evening I went back out. There was zero wind, I mean nothing. I aimed at the left side where the target met the cardboard. My shots still grouped half a mil to the right of where I was aiming. My first thought was rifle cant but I verified I was level. I started researching barrel indexing and realized this sounds like my problem. I just purchased Ernest rowes CF barrel sleeve for my wildcat. Will this sleeve fix the need for indexing or will I have to index WITH the sleeve to fix/improve the poi change? If I have to do it with the sleeve then I’ll wait to index till I receive the sleeve. 


thanks
Click to expand...

If the scope is not directly over the bore, and you are holding over to reach out to 100 yards it will be due to either a zero needing fine tuned or due to scope cant. 

Once that carbon sleeve is epoxied onto the liner and cured I would do an indexing test to get it straight with the optical center of the scope. And check for group size there as well.

Screenshot_20210114-182336.1610666699.png
Click to expand...

I made sure I wasn’t canted and my scope was level to the rail but maybe they aren’t perfectly in line. Have to investigate further. And when I get my CF liner sleeve I do plan to do more index testing. Thank you for the info! 
 
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