A few loads that have worked well for me:
Remington 24" barrel--
WW CCI BR2 HDY 139 GMX 54.0 grains Rl17 3035 fps
FC F210M NOS 140 E-TIP 55.4 grains RL17 3039 fps
FC F210M NOS 150 ABLR 60.0 grains VN560 3033 fps
(All sub-MOA)
Winchester 22"...
I never used Alpha brass. But Lapua and Norma always served me well in a wide variety of cartridges. I like Peterson brass as well, though I've only used it in a couple of cartridges.
Cartridge : .338 Federal
Bullet : .338, 185, Barnes 'TTSX' BT 30426
Useable Case Capaci: 45.444 grain H2O = 2.951 cm³
Cartridge O.A.L. L6: 2.820 inch = 71.63 mm
Barrel Length : 22.0 inch = 558.8 mm
Predicted Data for Indicated Charges of the Following Powders.
Matching...
Any of a number of powders would yield better case fill and higher velocities.
Cartridge : 6.5 Creedmoor Hornady
Bullet : .264, 140, Nosler BalTip 26140
Useable Case Capaci: 45.170 grain H2O = 2.933 cm³
Cartridge O.A.L. L6: 2.800 inch = 71.12 mm
Barrel Length : 22.0...
It wouldn't be an ideal case fill, but the powder would work.
Cartridge : 6.5 Creedmoor Hornady
Bullet : .264, 140, Nosler BalTip 26140
Useable Case Capaci: 45.161 grain H2O = 2.932 cm³
Cartridge O.A.L. L6: 2.800 inch = 71.12 mm
Barrel Length : 22.0 inch = 558.8 mm...
Otherwise, you have a variety or choices at or near 58K psi max chamber pressure.
Cartridge : .280 Rem.
Bullet : .284, 131, Hammer HeavyH
Useable Case Capaci: 61.467 grain H2O = 3.991 cm³
Cartridge O.A.L. L6: 3.330 inch = 84.58 mm
Barrel Length : 22.0 inch = 558.8 mm...