Home Forums Hunting & Shooting Hunting Rifles 3 or 4 groove rebore.?

If you were to have JESS do your rebore to .338" which number of groove would you run..3, 4, 5..?

5

If there's any difference in price, whichever is cheapest. I've gotten good accuracy out of 2-5 groove rifles.

I agree, land and groove count has no effect on accuracy, you just need a good job.

I believe JESS is known for doing quality work. Yes..?

99% seem to like his work. I'm pleased with the three rifles he's done for me. I'll send him more.

Pabucktail,

Thank you for the good report.

He did a three groove on my 35 Whelen. It sure is accurate.

Well, the Col. said that only accurate rifles are interesting.

Thanks for another great report boliep. I much appreciate it.!

I’ve got one I’m going to send him here shortly to rebore to a 35 whelen and he said 3 groove will work just fine so I left it at that. Seemed like a nice guy. Kind of excited to get this sent out and back

Ya'll are a bad influence.

If I was paying him to drill out my rifle barrel,
I would tell him to do what's best.

He should know more than us.

Yes, he does seem like one of the good guys. I got that impression when I spoke with him some time back.

He did a 358WIN from 7groovemm-08 for me. Three groove. Couldn't be happier with the results for the quick turnaround.

I only think a three groove is an issue with hyper velocity cartridges and thin jacketed bullets. Go with what JESS says or go back to what Whelen used.

Yup. Having had two rifles sent to JES for reboring I just said do what you would choose if it was your rifle....more than good enough for me then.

JES did a 30-06 to 35 Whelen rebore for me, in a Remington 7600. I went with a 3 grove, 1:10 twist, for heavy bullets. Shoots 225 gr TBBC, 250 gr coreloks, and 310 gr woodleigh (all factory loads) into a skinny 1". My rifle was one of the ones that he had to re-throat, because of a worn reamer. He made it right and went "above and beyond", to make sure all was good. Good guy.

Andy3

JES did a 30-30 Marlin to 38-55 for me. I told him it was to be a cast bullet only shooter. He recommended the 3 groove. It's turned out to be a very accurate non-finicky rifle, the easiest gun I've ever loaded to find good loads.

Interesting that three groove is good for cast bullets, I guess I bought the Marlin Micro groove hype. Also some old muzzle loaders had multiple shallow grooves but could be a by-product of the cutting tools available then.

Ask him which one of his cutters has produced the most even, and the smoothest finish. Tell him that's the one you want.

Number of grooves is not important but overall quality is.