Temperature sensitive loads

[MarineWinger]

I have a new load i worked up for my 300 wm. 73.8 gn RL26 with a Hornady ELD-X 200 bullet in Sig Sauer brass and a CCI mag primer. I worked this load up last winter when the temps on the range were below freezing (teens to twenties). Consistant velocity at 3000 fps +/- 10 fps. Loaded a batch of rounds, and now in the spring im shooting ~3150 fps consitanctly (faster load giving me a sticky bolt). From my understanding, Reloader 26 was supposed to be a temperature insensitive powder. Would temp make that big of a change in velocity? Any other thoughts of what the issue could be? I did notice my chorny manual said operating temp was > 32 degrees.

Thanks
Charlie

 

[Supersubes]

No, reloder 26 is not really meant to be insensitive to temps, it’s meant for speed. It isn’t terrible in temp swings though, and I’d wager something else is off in your combo.

 

[918v]

Cold welding of the necks to the bullets.

 

[supercorndogs]

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[MarineWinger]

I'll try a few different powder weights this weekend to get back to my original velocity.
Thanks for the expert advise!