Author Topic: Question about H380 (Read 415 times)

Patriot_1776 · « **on:** March 28, 2005, 07:59:25 PM »

How temperature insensitive is H380? Thanks in advance.

-Patriot

jd45 · « **Reply #1 on:** March 29, 2005, 12:41:19 AM »

Patriot, on Hodgdon's website, they list H380 with the spherical rifle powders, not with the "extreme" powders, so that's a clue. If you send an e-mail to help@hodgdon.com, I bet Mike Daly'll give you a more difinitive answer. Good luck, jd45

farmall · « **Reply #2 on:** April 07, 2005, 05:51:05 PM »

howdy, patriot. from what i have seen damned sensitive, but this may be affected by load density also. i have seen my 220 swift have primers fall out with my standard 40.5gn load under 55gn v-max. this is 2 grains under max, but too much on 85 degree days. no pressure signs/problems at 70 degrees. i dont have this problem in my 22-250 with 38.5gn and 55 v-max. this makes me suspect that load density may be a factor. as for myself im working up loads with ramshot powders now as i need good metering for lots of p-dog ammo. good luck and be safe!

vinconco · « **Reply #3 on:** April 08, 2005, 12:15:34 AM »

I have seen 200+ fps velocity variations in my 22-250 over a temp range between 40 and 80 degrees. While the primers don't fall out there were POI variations.

ricciardelli · « **Reply #4 on:** April 08, 2005, 03:10:34 AM »

Well, I use H-380 in a couple of my .22-250's, and have had no ignition problems, using standard rifle primers, in temperatures from 35 below zero to 125 above.