I used two work for a gunsmith part time in the 70's.There were always remington 742's and 740's in there that were torn up by IMR 4350 and 4831.Not from pressure to high for a 30/06,but to much pressure at the gas port.The bolt opens too fast too soon.Things tend to bend.Quite often beyond fixing.Those guns are designed to operate with a pressure curve like you get with 4895 and 150 gr. bullets.You can load heavier bullets but I wouldn't use any powder slower than 4064,4320,Varget,RE 15,or 748 somewhere in that range of burning rates.I've delivered stuff to and picked up from the remington ammo plant in Lonoke,AR several times, they get powder by the train car.Reloaders have never been able to get the same stuff they use.A lab tech goes and gets a sample and they figure out how much to put in whatever caliber their loading this week.Of course there are different burn rates they don't use the same stuff in everything but we can't buy it.H4895 or IMR 4895 are hard to beat in a semi auto.