CBI 260 Remington Match Chamber Question

[sawacs]

I have a chance to purchase a CBI varmint contour 26" barrel in 260 Rem with a match chamber. My question is would I still be able to load 123 scenars to the lands? I know there would not be any problems with the 139's, 140's or 142's but I would like to shoot the 123's for hunting also.

The chamber on the match is .160 and the chamber on the non match 260 is .118.

Thanks,

Shawn

 

[jonbearman]

Do you mean the cbi has .160 thou of freebore or am I not understanding this very well.

 

[trailrider121]

I have a CBI 260 REM heavy sporter with match chamber. I've only shot 130 vld so far, and touch lands with a col of 2.950". My barrel has a .160" of freebore.

 

[sawacs]

I should have explained the measurements a little better

The match chamber has .160 thousandths of freebore vs .118 thousandths..

The more I think about it the more I think I will be okay. I am mainly worried about the base of the 120 L's and the 123's being too far forward in the case neck while being seated .20 or .10 from the lands. I haven't given the VLD's any consideration since I hear they are picky little turkeys.

Thanks,

Shawn

 

[trailrider121]

I don't have anything lighter than 130's, but I did try a 136 Scenar and it measured 2.900" max col touching lands.

I'm sure you'll be fine. These CBI's are tack driving barrels IMO.

 

[alphapygmy]

I'm shooting the CBI match barrel with the .160 freebore. I've used both the Sierra and Lapua 123's and they worked great. On my setup the measurements were ~2.840 COAL and 2.290 from ogive to base. That was .020 off the lands. My load is 45.5 gr. of H4350 and is near max for my gun. I sawed off 2 inches and I'm getting right at 3000fps with the 24".

 

[Erik Cortina]

You will be fine. My 6.5x47 Lapua has a .175" freebore and even the Nosler 100 gr. bullet work well in it. 123's will work perfect, go for it.