Can,t wait to start shooting my first precision BUT???

CyaN1de said:
I don't think it is the powder that is in question here, if your at the limit of twist rate to bullet length, shoot a lighter/shorter bullet or get a faster twist barrel......pretty simple.

Do the same with an IMR Powder and see which load hits instability first.
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Agreed, and I like Varget. I am just pointing out a single experience I had that indicated to me at least that Varget is not temp stable in all conditions.

On the flip side I shoot a fair bit of BLC2 year round and never experience the fluctuations in performance that, according to some, its capable of. So yes as I think you are suggesting, there's more to the performace of a load than just the powder.
 
This is from my own experience.. Not Varget but Retumbo. I made my range card at +9 they say there should be a elevation change with temperature change. I was out when it was -19, shooting 1750 yards. I dialed in the appropriate dope and bang first round hit. I think that if you are shooting a 3-6 inch target or trying to push bullets on top of each other you need to account for temperature change. Other than that that don't worry about it. You may choose to, but for me I won't because I have shot it and believe you don't have too. My opinion.
 
I don't recall where I read it but the they quoted a 50fps change per every 20 degree change in temp. (frank scale) But you know what, new gun, new barrel, go shoot the darn thing! You are quoting a "starting load". You don't know what your gun will like, so go find out while breaking it in. Powder charge, bullet weight, length of over all round, jump to the lands......
You only have 3 months left to summer, best get started! Good luck! If you can get access to a chronograph it will help you understand what you are doing better.
SRSA311
 
cptchaos said:
Cold bore 300m v-bulls and 1/2 MOA groups on target no matter what the weather. Varget is OK by me... 45.5 gr works in my Savage.
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That's about right for me too in my Savage, some bullets like 45.1 - A-max 155grs - summer or winter

ps. if it's too cold, do you really want to be paper punching? :p
 
Hodgdon makes several different powders in their 'Extreme' line (Varget is one) which are supposed to be temp insensitive, or have very little velocity difference between temp changes. H4895 might be a good choice.
This is a most versatile rifle powder. This member of the Extreme Extruded line powder is great for 17 Remington, 250-3000 Savage, 308 Winchester and 458 Winchester, to name just a few. It is amazingly accurate in every cartridge where it is listed in our data. It had its origin in the 30-06 as a military powder and was the first powder Bruce Hodgdon sold to the loading public. Available in 1 lb. & 8 lb. containers.
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Extreme rifle powders
 
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