MagnumManiac
Well-Known Member
JB works best if used with a calibre specific jag…tight.
A brush doesn't have enough force to lay the roughness over.
Cheers.
A brush doesn't have enough force to lay the roughness over.
Cheers.
If you look closely between pic no.1 and pic no.2, you can see I have already lightly lapped that barrel, I will use JB on it every time I clean it for about a dozen times. I can't complain, it was a customer return warranty and I got it for less than half price, a Win Model 70 EW Portuguese made rifle. It had crooked scope mount holes, so I drilled them to 8-40 and later found the rough bore, it shoots sub MoA with 225g Accubonds.
Cheers.
I have both 338-06 and 338WM, my fastest barrel will easily push a 225g to 2980fps, the slowest to 2890fps in the 338WM, the 06 will get 2680fps tops with a 225g. 250's top out at 2775fps in WM and 2550fps in the 06, all with 26" barrels. So, about 200fps difference across the board.On a 30-06 based wildcatted 338 you won't quite see 338 Win ballistics. Heck, I can't even get 338 Win from my 35 Whelen and she should push better with the extra diameter. I get to 2900 fps from a 225 Hornady or 2750 fps from a 250 Sierra in my 338. Anything within 200 fps would be about all I expect. I do have a 26" bbl. on my #1 in 338Win.