I am trying to move to a single do all powder for three different rifles. I think 4451 will allow me to do that. It outshot 4350 for both 85hpbt and 100 Prohunter in my 6mm. I went to a 140grain Gameking in my 270 which shoots everything pretty well but it did improved that group too.
Jury is still out with my 260. I waffle between 120 and 140 Sierra's here. The 120 4350 load is my best shooting of all time but the 140 gives best on game performance of anything . I have not worked up valid ladder to offer results for 4451. It is on deck.
I heard folks say you could just use your 4350 load with 4451 and accuracy is magically improved. The two min max are close and it should be safe to use a max 4350 load with same amount of 4451 as max on it is greater. My pet 4350 loads did not translate exactly into 4451. It can perhaps give you a ballpark reference for a starting place in your min-max.
Oh- 4451 looks like 4350 and meters about the same. Less temperature sensitive but I doubt that will ever matter to me. It just added to the initial hype that prodding me to buy and fix something else that wasn't really broke. :-)
Last edited by kenjs1; 04-12-2017 at 09:16 AM.