9.3x64'

Thank you for your very good advice, your thoughts on this matter are a reflection of mine and in fact the reason for this post.

I have been reloading since 1976 & consider myself playful. I like to establish the limits & then settle for a safe working load that shoots! I start loading the 9.3x62 in 2004 with fireformed PMC 3006 cases because the Norma stuff was expensive & hard to get those days. I have extensive data using AR2208 (Varget), AR2206H (H4895), AR2206 & a variety of bullets in my Tikka M65 (56.0cm barrel)where I settled on 2400fps with 286gn WoodleighRN & 2500fps with 270gn Speer as my hunting loads.

In the process I established 2450fps as maximum in my old Tikka with AR2208 & the 286gn bullet which is similar to my newer custom FN (60.0cm Walther barrel)which max's at about 2475fps with Norma/PPU cases, AR2208 & 286gn bullet, although the actual powder densities differ some!

My R17 velocities 2600fps with 286gn Woodleigh & 2500fps with 320gn Woodleigh initially frightened me because they had jumped plenty from the previous lighter loading. However after considerable analysis (all of your suggestions)they appear to generate similar pressures to my max AR2208 loads. This has been somewhat confirmed by chronographing the velocities of both loadings together.

Overall, I am confident I have gained at least 100fps on my previous working loads which reflect Hodgdon & ADI data!

The original goal was to get a powerful 320gn load (maybe 2400fps Woodleigh WCRN) to hunt feral cattle & buff. I had fallen short with AR2208 & could not fit enough AR2209(H4350) in the case.