Ive tested with Varget but never had a rifle that liked it. A friend just yesterday found out his 6XC loves it and I gave him my condolences. I may give him my Varget. I have a number of cartridges that really shoot great with IMR-4166 and in addition, it is temp stable and has a decoppering agent that works great in my rifles. Ive reduced my target shooting by 90% and only do hunting and load development now. Let Chris Hodgdon and Vista eat powder. Ive loaded enough to last me a while as I put my reloading equip in storage for 8 months while we move to a more gun friendly state.