H380 max loads for .22-250....???

[Old time reloader]

If you use H 414 you use a Mag. Primer. That to is ball powder.

 

[dale06]

I think I would go with the powder man. data. h380 is temp. sensitive so
watch your loads when spring and summer come around. That is the only
reason I have changed to varget as a powder of choice.

I also dropped H380 for Varget because Varget is not affected by temperature changes. That matters to me when I’m shoot in a temperature that can vary as much as 70 degrees.

 

[George Foster]

I used H380 in a Rem188 22-250, back in the early 2000's. I had it rechambered because of excess head space, and it was quite accurate with the Sierra 55SPTZ with 40gr H380, but in the heat of the summer you had to be careful of high pressures if up around 90°.