Hi, I've got a load recipe for the six five that consists of a 129 gr Hornaday Interlock driven by 44 gr of Hogdons H4350 I've chronoed them at approx 2700 fps. I've been using this as the last load I used was the same just a little lighter on the fuel at 41.3 gr and running at 2560 fps. I binned this 41.3 gr load as whilst being disturbingly accurate with all holes touching at 100 yard zeroing sessions, it was a bad one for passing strait through the Muntjac and not doing the business, and yet, not passing through fallow deer.
Annoyingly the 44gr loads still don't seem to want to exit the animal. I've shot 7 dear in the past 2 months using this load (fallow and MuntJac) but they don't want to pass through at any range over about 50 to 60 yards, at 50 to 60 yards they are a good killing round but not thereafter. Over 60 yards they put them down alright, bullets recovered look brilliant and are nicely mushroomed, its just that they are not working quite as efficiently as one would hope, they don't bleed out as fast as they should, they all move at least 20 to 30 yards and then drop, albeit without much of a blood trail owing to the lack of penetration which can be a pain in good dense cover.
I've now built up a 140 gr load using the same ingredients as I've read it holds a much higher sectional density and better coefficient at 100 m ranges. I just hope I don't get that needeling effect again as I had on the close range Muntjac with the 41.3 grain loads. I wonder if anyone can shine some light on this one ?