I don't think there is a 6.5-06AI in Quickloads. There is the A-Square and Gibbs that I saw. You didn't specify OAL so I left it at the standard.
Cartridge : 6.5-06 A-Square
Bullet : .264, 150, Sierra HPBT MatchK 1755
Useable Case Capaci: 60.171 grain H2O = 3.907 cm³
Cartridge O.A.L. L6: 3.340 inch = 84.84 mm
Barrel Length : 30.0 inch = 762.0 mm
Predicted Data for Indicated Charges of the Following Powders.
Matching Maximum Pressure: 64900 psi, or 447 MPa
or a maximum loading ratio or filling of 106 %
These calculations refer to your specified settings in QuickLOAD 'Cartridge Dimensions' window.
C A U T I O N : any load listed can result in a powder charge that falls below minimum suggested
loads or exceeds maximum suggested loads as presented in current handloading manuals. Understand
that all of the listed powders can be unsuitable for the given combination of cartridge, bullet
and gun. Actual load order can vary, depending upon lot-to-lot powder and component variations.
USE ONLY FOR COMPARISON !
Cartridge : 6.5 mm Gibbs
Bullet : .264, 150, Sierra HPBT MatchK 1755
Useable Case Capaci: 65.531 grain H2O = 4.255 cm³
Cartridge O.A.L. L6: 3.340 inch = 84.84 mm
Barrel Length : 30.0 inch = 762.0 mm
Predicted Data for Indicated Charges of the Following Powders.
Matching Maximum Pressure: 64900 psi, or 447 MPa
or a maximum loading ratio or filling of 106 %
These calculations refer to your specified settings in QuickLOAD 'Cartridge Dimensions' window.
C A U T I O N : any load listed can result in a powder charge that falls below minimum suggested
loads or exceeds maximum suggested loads as presented in current handloading manuals. Understand
that all of the listed powders can be unsuitable for the given combination of cartridge, bullet
and gun. Actual load order can vary, depending upon lot-to-lot powder and component variations.
USE ONLY FOR COMPARISON !
Thanks Nathan... I blew the COL , it's 3.410 but this gives me a good idea. Might get a little more powder in the longer COL but most likely wouldn't make much of a velocity increase.
Side note; do you have an improved 338 Lapua AI? Trying to find out what velocity increases might be attained. Got a FCP HS in Savage that I ve given some thought to punching out.
Frank
Call me sometime to catch up ... I m still in SE Boise off Boise Ave.
I don't have a 338 LapuaAI just a standard. From what I've seen there is about 100fps of difference in the two with top velocity loads. A 338 Lapua will run 2900 or a little more with N570 or R33 and a LAI is around 3000fps. The nice thing is not having to trim brass.
I figured 100 -125 fps was about what could be expected. As you said trimming minimization is probably biggest deal. Putting longer barrel on, say 4" would probably get another 100 fps +\-