BLue Duck 357---In the winchester manual --Twelfth Edition-- in the middle of page 45 under notes it says "Do not reduce powder charges with 296 powder"
I use 296 in my 357mag&max and also in my 30 Carbine MI
I shoot my TC 357 !4in in Hunter silhouette
--max is not allowed--Max is carried for hunting back up some--
Load for mag is 16.0 with 158 semi jacket Max is 24.5 with same bullet--Heavy crimp on both loads
I have shot groups Bench rest at 100 yds less than I moa several times with that load in the mag -- the max won't do that good