Proceed cautiously. TAC is very dense and fine grained, so don't even think about getting close to having a compressed load.

I neck size my cases and my rifle has more headspace than other 35 Whelens. This I know, because my rounds will not chamber in my buddy's CDL. So I have max powder capacity.

Started using TAC w/ 358 WIn loads after reading an article by Barsness about the 338 Federal vs the 358 WIn. Barsness got more TAC into his 358 WIn cases than I could manage, so I ended up using Ramshot's X-Terminator. But, I gave TAC a try in my 350 Rem mag...It's my go to powder now for 225 gr TSX bullets.