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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
I’m always busy at the wrong time…for SCIENCE!!!😡🤣. Anyone ever shoot at these temps and get chrono numbers?
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<blockquote data-quote="Mike Matteson" data-source="post: 2386771" data-attributes="member: 101791"><p>I haven't had time to do the testing I want to do. I have ran into trouble in the early 2000 or late 1998. I was working up a load for my 308 NM at the time. I had develop it in the last winter. So where around 50 to 65 degree area. Stop on that rifle and went to something else. Came back to it in early summer. Temp was somewhere around 90 to 100 degree. I don't remember what the velocity was at that time and day. I blow the primer out of my cartridge. I was getting a very consist 3400fps with a 165gr Nosler ballistic tip in the winter with that rifle. I hadn't realizes the IMR 4831, and IMR 4350 were so subject to temperature change. My load was IMR 4831 @ 75.8grs, Fed 215 primers, Win Brass, Case weight 238.5grs. 165gr Nosler B.Tip. Long story to short. I gave away the IMR Powders and never use them again. I changed to H powders. Presently using H4350 in my 308 NM rifle. I got better velocity with the Fed 210 primers and groups with a 26" barrel length. Now I have use that H4350 powders in weather in 100+ to -20 degree without any notable change in point of impact. Never ran test at the range. Hopefully I will this next year, if complete my move to Montana.</p></blockquote><p></p>
[QUOTE="Mike Matteson, post: 2386771, member: 101791"] I haven't had time to do the testing I want to do. I have ran into trouble in the early 2000 or late 1998. I was working up a load for my 308 NM at the time. I had develop it in the last winter. So where around 50 to 65 degree area. Stop on that rifle and went to something else. Came back to it in early summer. Temp was somewhere around 90 to 100 degree. I don't remember what the velocity was at that time and day. I blow the primer out of my cartridge. I was getting a very consist 3400fps with a 165gr Nosler ballistic tip in the winter with that rifle. I hadn't realizes the IMR 4831, and IMR 4350 were so subject to temperature change. My load was IMR 4831 @ 75.8grs, Fed 215 primers, Win Brass, Case weight 238.5grs. 165gr Nosler B.Tip. Long story to short. I gave away the IMR Powders and never use them again. I changed to H powders. Presently using H4350 in my 308 NM rifle. I got better velocity with the Fed 210 primers and groups with a 26" barrel length. Now I have use that H4350 powders in weather in 100+ to -20 degree without any notable change in point of impact. Never ran test at the range. Hopefully I will this next year, if complete my move to Montana. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
I’m always busy at the wrong time…for SCIENCE!!!😡🤣. Anyone ever shoot at these temps and get chrono numbers?
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