Thread: Kimber Montana Ascent 280AI Load Development

162gn ELDMs worked up with RE26 and Fed match primers, Norma brass. Mag length.

58, 59 and 60gn loads to test pressure. No issues although the 60gn load blew out the group and the primer strike was off center. No pressure signs.

61gn group first two shots together and third off to the left. No pressure. Excellent velocity and SD so some promise. Also had the Forbes 280AI to sight in but forgot the bolt so this group was shot without much time between shots. Shot all 3 from the mag as a check and do like controlled feed.

Beforehand I also found the internal mag was binding to the action from bottoming out against the stock. So fixed that. Front action screw isn't contacting (good), but Talley front base screw is known to contact barrel threads so will remove scope to check.

I think I'll shoot the 61gn load again with same just fit in the mag COAL.


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