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Sako 338 LM cartridge lenght

kenai

Private
Minuteman
Apr 13, 2011
1
0
71
Hi - there are 3 lenghts for 338LM ammo; 3.6 / 3.68 and 3.76; above rifle has a 3.75 magazine so the 3.76 ammo is for the A.I. Question is - what is correct or best for Sako the 3.6 or 3.68??
Seems the orginal sako's were 1/in 12 and the newer are 1/10. Will the older twists stabilize a 300 gr bullets or is a 1/10 twist needed. are the 1/12 rifles 250 gr only?