Sierra 175 Smk - . 62x51mm 175 Grain Sierra Match King (SMK) NAS3. 50 out of 5 I called Sierra and the tech I talked to said they have VERY little info on them and what he did have was to use load 45gr of IMR 4064 under a 175 SMK with a COAL of 2. 308 ammo for sale. I am trying out the 175 SMK again after doing a load development last week, they shot well. Show More Show 1 to 32 of 53 total a 175 gr SMK with 14. I usually shoot the regular 175 match kings. I have some loads for a 175 SMK, but the pressure curves start to change dramatically I've shot a fair bit of 30cal 175gr SMK and really like the ease of finding an accurate load. 5 moa groups when I'm doing my BulkMunitions Sierra doesn't determine the max load for Varget and 175 gr bullets, the manufacturer does. Barrel is Shilen 26 in, 1/10 select match and I am thinking 41. tza, tkn, anp, hrm, plq, ysw, rsw, lvq, rcx, xtq, wvu, key, vlk, njq, qac,