260 rem data

[bobby]

hi all
im looking for advice on reloading 140gr game changes , i bought a box but shouldn't of and it seems like it's not a popular bullet to use in the 6.5 mm cal cartriges as i got no bites in my for sale ads .

any ways it looks moer long . i'm using 140gr game kings at the moment with s365 and 42.5gr and think that is a compact load . i load to fit in magazine ,length of mag is 72mm ( tikka t3 )so i try load to 71,5mm so it doesn't catch in mag.

i was wondering if s355 would not be a little better for this bullet ? has anyone used the 140gr sierra game changes in the 260rem with s365 or s355 ?

many thanks bobby

[tripodmvr]

S365 is your best bet with heavier bullets

Cartridge : .260 Rem
Bullet : .264, 130, Sierra TMK 7430
Useable Case Capaci: 46.145 grain H2O = 2.996 cm³
Cartridge O.A.L. L6: 2.815 inch = 71.50 mm
Barrel Length : 24.0 inch = 609.6 mm

Predicted Data for Indicated Charges of the Following Powders.
Matching Maximum Pressure: 55000 psi, or 379 MPa
or a maximum loading ratio or filling of 100 %
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 !

2 loads produced a Loading Ratio below user-defined minimum of 80%. These powders have been skipped.
Powder type Filling/Loading Ratio Charge Charge Vel. Prop.Burnt P max P muzz B_Time
% Grains Gramm fps % psi psi ms
--------------------------------- -----------------------------------------------------------------
S365 Reg 100,0 42,3 2,74 2817 100,0 51403 9218 1,243 ! Near Maximum !
Somchem S365 100,0 42,3 2,74 2803 100,0 50620 9192 1,251
S355 Nuut Mei 2014 87,5 36,4 2,36 2771 100,0 55000 8553 1,234 ! Near Maximum !
S355 Reg 93,8 39,0 2,53 2769 100,0 55000 8731 1,234 ! Near Maximum !
S361 Reg 99,5 45,1 2,92 2754 94,2 55000 9233 1,221 ! Near Maximum !
S321 Reg 82,1 37,6 2,44 2752 100,0 55000 8456 1,232 ! Near Maximum !
S341 Reg 85,7 39,2 2,54 2752 100,0 55000 8496 1,224 ! Near Maximum !
Somchem S341 86,1 39,4 2,55 2750 100,0 55000 8490 1,224 ! Near Maximum !
Somchem S321 82,7 37,9 2,45 2749 100,0 55000 8446 1,232 ! Near Maximum !
Somchem S361 100,0 45,3 2,94 2698 93,4 52223 9007 1,252 ! Near Maximum !
S385 Reg 100,0 43,0 2,79 2692 96,1 47811 9306 1,302
Somchem S385 100,0 43,0 2,79 2674 95,8 46998 9238 1,313
S335 Reg 83,7 34,8 2,26 2672 100,0 55000 7441 1,243 ! Near Maximum !
Som 335 303_1 87,4 36,4 2,36 2662 100,0 55000 7427 1,246 ! Near Maximum !
Som 335 303 87,3 36,3 2,35 2661 100,0 55000 7416 1,246 ! Near Maximum !
Somchem S335 87,3 36,3 2,35 2661 100,0 55000 7416 1,246 ! Near Maximum !
Somchem 12.7-0 100,0 43,9 2,85 2024 59,4 25324 6155 1,704

[bobby]

thanks but i see that data is for 130gr sierra tmk

[tripodmvr]

Difference between S365 and S355 is even more pronounced - 90fps difference

Cartridge : .260 Rem
Bullet : .264, 140, Sierra SPBT 1730
Useable Case Capaci: 47.333 grain H2O = 3.073 cm³
Cartridge O.A.L. L6: 2.815 inch = 71.50 mm
Barrel Length : 24.0 inch = 609.6 mm

Predicted Data for Indicated Charges of the Following Powders.
Matching Maximum Pressure: 55000 psi, or 379 MPa
or a maximum loading ratio or filling of 100 %
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 !

3 loads produced a Loading Ratio below user-defined minimum of 80%. These powders have been skipped.
Powder type Filling/Loading Ratio Charge Charge Vel. Prop.Burnt P max P muzz B_Time
% Grains Gramm fps % psi psi ms
--------------------------------- -----------------------------------------------------------------
S365 Reg 98,8 42,9 2,78 2769 100,0 55000 9333 1,252 ! Near Maximum !
Somchem S365 99,3 43,1 2,79 2768 100,0 55000 9324 1,252 ! Near Maximum !
S385 Reg 100,0 44,1 2,86 2692 98,1 52611 9729 1,288 ! Near Maximum !
S361 Reg 96,9 45,0 2,92 2680 95,5 55000 9483 1,260 ! Near Maximum !
S355 Reg 91,1 38,9 2,52 2679 100,0 55000 8778 1,275 ! Near Maximum !
S355 Nuut Mei 2014 85,0 36,3 2,35 2678 100,0 55000 8593 1,274 ! Near Maximum !
Somchem S385 100,0 44,1 2,86 2676 98,0 51721 9666 1,299 ! Near Maximum !
Somchem S361 99,0 46,0 2,98 2670 95,5 55000 9408 1,261 ! Near Maximum !
S341 Reg 83,3 39,1 2,54 2664 100,0 55000 8546 1,264 ! Near Maximum !
Somchem S341 83,7 39,3 2,55 2662 100,0 55000 8541 1,264 ! Near Maximum !
Somchem S321 80,4 37,8 2,45 2659 100,0 55000 8499 1,272 ! Near Maximum !
S335 Reg 81,4 34,8 2,25 2581 100,0 55000 7495 1,284 ! Near Maximum !
Som 335 303_1 85,1 36,3 2,35 2572 100,0 55000 7489 1,286 ! Near Maximum !
Som 335 303 85,0 36,3 2,35 2571 100,0 55000 7478 1,287 ! Near Maximum !
Somchem S335 85,0 36,3 2,35 2571 100,0 55000 7478 1,287 ! Near Maximum !
Somchem 12.7-0 100,0 45,1 2,92 2049 63,7 27438 6840 1,697