Thread: Test load temps

Mate I think your questions are a little scattered. You're worried about temp induced velocity change which is a small part of a big picture, yet seem to be at the very beginning of load development. Talking about a 1 inch drop at 500yds yet the group from your test is a touch over 1 MOA so it would at best print a 5 inch group at 500yd in perfect conditions with perfect shooting.
This can be a long process from a cold start. Small steps ,from the beginning, no point getting ahead of yourself.
Shoot a lot of paper?steel, it dosnt lie , work on the load with the OCW process or something similar. I personally use a basic 3 shot group test for powder, looking for group size and ES ,SD, followed by seating depth if needed. maybe neck tension and primer change if I need further tweaking.
Theres little point in sweating the small stuff till you've got the big stuff sorted.

For the record, with temp sensitivity, once I have a proven accurate load ( more than 3 consecutive groups on different days ) with a good ES and SD in single figures(hopefully) I will shoot it in the temps I think are relevant and note the speed and drops. This used to be a slow process but the accuracy of the labradar is proving a great time saver. Once I have the change in fps per deg of temp change I can enter it into the ballistic app on my phone.