6mmDTI 22 inch barrel 1 in 10 . So far I have tried H4895 Fed primers 205M with OAL of 2.260 With very good results. This is the load that I took a deer with this year. I tried .010 , .020 and .030 off the lands and .020 is the best. This load is also showing signs of pressure. First time with Varget 29gr is the best and 29.2 showed some flatting of the primer.