65 Vmax in a 1:14 barrel with Vit N133?

[6ppcvarminter]

Hello Guys,
I have just about decided to have my custom 6PPC re-chambered to 6BR,Border barrels are only 2 hours drive away and are extreamly good).
My barrel is a 1:14 Heart cut at 22 inches, I get 3400 fps with 29.5 grains of N133 and a 65 grain Vmax.

Has anyone used N133 in a BR with 65/66 grain bullets?
,I have a lot of this powder so would like to use it up).

How much velocity am I likely to get as if the increase is not going to be significant then it may be pointless, having said that to get 3400 fps the loads are very hot so even a marginal increase in velocity may be worth it if the pressure is mild?

Thank you.

Steve.

 

[Forum Boss]

Hello Guys,
I have just about decided to have my custom 6PPC re-chambered to 6BR,Border barrels are only 2 hours drive away and are extreamly good). My barrel is a 1:14 Heart cut at 22 inches, I get 3400 fps with 29.5 grains of N133 and a 65 grain Vmax. Has anyone used N133 in a BR with 65/66 grain bullets?,I have a lot of this powder so would like to use it up).

How much velocity am I likely to get as if the increase is not going to be significant then it may be pointless, having said that to get 3400 fps the loads are very hot so even a marginal increase in velocity may be worth it if the pressure is mild?

Steve, You're correct to assume the velocity increase might not be all that significant. Looking at the Varmint loads people have given us, we're listing 3400 in the top end range for the 65 grainers. That said, some people were getting higher speeds with AA 2520 and 2230 than we wanted to publish. But with N133 the gains really might be marginal from a 22" Tube.

 

[chino1969]

I can't speak for N133 but 31.0 grn. of N135 produces neat little holes measuring < 3/8" @200 meters for a 5 shot group in my 6BR. This is using Federal match primers, Lapua brass neck turned to .263, and Hornady 65grn. V-Maxes & Berger 65grn. MEF boat tails. This is in a 1:14 Hart with a .265 neck diameter