New 6mm BR

[kbcuda]

Hello all,
I'm building a 6mm BR for my 13 yr old daughter who has been shooting for 5 yrs. I should also add she has been putting it to daddy at the rifle range lately. Here is what I have for her so far. A trued Rem. 700 ADL,chambered in 6mm Br. Ive added a plate to the bottom of the action to make it a single shot rifle. Douglas 26 inch straight tube, no turn .272 neck 1 in 14 twist, 11 degree crown. Lapua brass with Remington 7 1/2 benchrest primers and 70 gr. Sierra's. 2.190 OAL is .010 off the lands. I'm having a custom laminated stock built to fit her that we should get back tomorrow. The gun has yet to be fired. I've loaded break in rounds using 29.0 grs. of H-322.

With this combo what are my best loads for Accuracy? ie. powder, bullets and seating suggestions.
thanks, kbcuda

 

[Wild_Bill]

I love Sierra Bullets for long range shooting and will not use anything else i also like there hunting bullets but if you are serious buy some custom hand made benchrest bullets they are not much more than factory bullets but they will probably halv the groups.

the rest should be ok but just get her and yourself some good bullets.

Cheers Bill
Australia

 

[kbcuda]

Thanks for your response.

I was thinking about some flat based Bart's in 70 Gr.
Do you have any other suggestions or combinations?
kent.

 

[dreever]

Bart's makes three different 68 grain custom bullets. The Origional, the Wedge, and the Ultra.
The Wedge has a larger pressure ring than the Orgional, the Wedge has the same pressure ring as the Origional but the ogive and shape of the Wedge.
I'd recommend the Origional or the Ultra since that larger pressure ring might be to much for unturned brass. What is the freebore of your chamber? If it's .050 or less either should work fine.