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Rifles, Reloading, Optics, Equipment
Reloading
temp stability of powder
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<blockquote data-quote="justgoto" data-source="post: 409650" data-attributes="member: 17125"><p>I notice a huge difference in H 414 when above freezing. Every 20 or so degrees would result in velocity increase and loss in accuracy.</p><p></p><p>I shot H 414 all winter with 190gr SPBT in my 30-06 and had no problems with accuracy, about 1moa at 400 yards in 40 degree temperature swings all below freezing. As soon as it got warmer I had to change to IMR 4831 so I didn't need 4 different loads standing by to use according to temperature.</p><p></p><p></p><p></p><p>I noticed that IMR 4064 was temp sensitive using 110gr bullets in my 30-30. I was shooting about 12 inches higher at 300 yards every 10 degree temperature change. When I moved up in bullet weight to 150grs it became much more stable. Testing was done between 50 and 80 degrees.</p><p></p><p>I changed powder to VIHT N 135 with the 110gr bullets and that works wonderfully. I only have tested those from 50 to 90 degrees so far.</p></blockquote><p></p>
[QUOTE="justgoto, post: 409650, member: 17125"] I notice a huge difference in H 414 when above freezing. Every 20 or so degrees would result in velocity increase and loss in accuracy. I shot H 414 all winter with 190gr SPBT in my 30-06 and had no problems with accuracy, about 1moa at 400 yards in 40 degree temperature swings all below freezing. As soon as it got warmer I had to change to IMR 4831 so I didn't need 4 different loads standing by to use according to temperature. I noticed that IMR 4064 was temp sensitive using 110gr bullets in my 30-30. I was shooting about 12 inches higher at 300 yards every 10 degree temperature change. When I moved up in bullet weight to 150grs it became much more stable. Testing was done between 50 and 80 degrees. I changed powder to VIHT N 135 with the 110gr bullets and that works wonderfully. I only have tested those from 50 to 90 degrees so far. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
temp stability of powder
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