heaviest bullet that 1:10 .243 will launch

[nm2602]

Hi,
will be starting f-class this year,hopefully) currently using a factory standard sako varmint stainless laminated, that produces almost one hole groups with 70gr noslers and 75 vmax, will this barrel in 1:10 launch the 105 Berger vld's with success at 600yds?
Is there a table anywhere that gives caliber/bullet weight selection/twist requirements, as i will be having a specific f-class 6mm built later this year as too which 6mm yet to decide.

best regards

nick

 

[Forum Boss]

You should try the Lapua Scenar 90s and the Berger 95 VLDs. The Scenars should definitely work with your 1:10". The 95 VLDs will be marginal. With hot loads in a fast barrel, some guys are shooting them with success from a 10-twist out to 600. Other guys find then need a true 1:9" and a 1:8.5" would be even better.

Remember stability is based on how many revs the bullet picks up in the barrel. This, is turn, is a function of BOTH twist rate and velocity,the quicker the pill moves through the rifling, the more revs it attains).

To shoot the 105s, 106 CRs, and 107s you'll need a 1:8".