Unless you are loading for a gas gun I would not crimp. Precision loads for bolt rifles in my opinion should not be crimped. Have tried both.
The Accurateshooter web site recently posted an article that tested a variety of powders for temperature stability. interestingly they found H4350 varied the least of all powders tested re temp changes and also proved extremely good for accuacy loads.I used Varget and 4895, both worked well.
If you create an account at precisionreloading.com and add varget (or any powder or item) to your wishlist and enable email notification they'll send you an email when it's in stock.
I've done this with H4350, and other things and it works great.
Also when I looked this morning they had 1lbers of Varget in stock, but I would recommend buying an 8lber or multiple 1lbers then mixing them with each other (of the same type of powder mind you, don't mix two different powders)
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