foxpig Posted May 1, 2022 Report Share Posted May 1, 2022 Having aplay about with 6mmx47lapua Tikka t3 Bartlain 24" 105gr hybrids N550 What's your opinions on whitch charge weight to go for. I have an idea, just intrested in yours. Interestingly all 9 shots where in a very small bug hole with no flyers , and I didn't get any sticky bolt or pressure signs at all . I just didn't feel need to go higher. Quote Link to comment Share on other sites More sharing options...
jcampbellsmith Posted May 1, 2022 Report Share Posted May 1, 2022 There's not enough info to decide. I would try 3 rounds at each of the following charge weights - 38.8, 38.9, 39, 39.1 & 39.2. If possible I would also shoot them at 150 - 200 yards. Then review the results and plan a further test. Regards JCS Quote Link to comment Share on other sites More sharing options...
Catch-22 Posted May 1, 2022 Report Share Posted May 1, 2022 I wouldn’t focus on velocity. Whats your ES & SD for each of those charges? That’s more important. Find the 3x charges with most stable/consistent ES & SD (preferably lowest SD) and you’ve found your Optimum Charge Weight. This will be your most stable charge Adjust seating depth to fine tune group size. After above done, then note your velocity and store it in your ballistic calculator. Quote Link to comment Share on other sites More sharing options...
Popsbengo Posted May 1, 2022 Report Share Posted May 1, 2022 You report a MV variation of 143 fps yet a 'very small bug hole'. I'd say you have a pretty solid node. You need more data but if further results match the first, not much to worry about beyond a fine tune of seating depth. Quote Link to comment Share on other sites More sharing options...
Big Al Posted May 1, 2022 Report Share Posted May 1, 2022 I dont see any load development, just a graph. Nothing there tells me anything about accuracy, consistency or POI stability. Quote Link to comment Share on other sites More sharing options...
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