Tim, I like your scientific approach. Why did you go with the 145s instead of the 168s?
Thanks wy-tex. Great price you got on a very nice rifle. I like the 300wsm, but if I stick with a 300 it'll be the Win Mag due to ammo availability.
Mostly I wanted a bit more velocity than I'd get with 168's in a 280, even though my max range is 600. Another factor is I prefer a lead or polymer tip, for that extra assurance upon impact, over a very small HP like a Berger, especially for potential lower velocity impacts. I also have a genetic predisposition to go against the crowd, ie: the Berger's sudden popularity, I'm a work in progress...
A little extra velocity helps assure bullet perfromance and I am not sold on the lighter Berger offerings for elk for my 280. If it could send a heavier Berger fast enough, fine, but I lack the case capacity. I intentionally wanted to find a SD of around .260+ in a bullet I could launch close to 3,000fps. Sorta of a sweet spot to be fast enough to have some advantages (terminal ballistics/drop/wind) and not be too hard on the barrel or my shoulder.
I tested the Barnes 145's, 154 gr. Inter bonds, 150 gr. LR Accubonds, and Swift 150gr Scirocco's. The gun actually shot the 154 gr. Interbonds best, .3 - .4 moa, but bullet availability scared me, so the Barnes shot the next best, .6 ish moa. So I got 80 rounds loaded and off I went. I used a Superior Ammo test box. They are one of several custom and semi-custom loaders.
http://www.superiorammo.com/ The DoubleTap is great ammo too, and not much more than factory.
http://www.doubletapammo.net/
The gun also loves some old Federal factory 140 and 160 Accubonds I bought many years ago. I've shot a 280 a bunch and always favored a Nosler 150 gr partition, as I kept it under 400 yards, but their velocity envelope was right on the line for me at 600. I'd happily use the 140 or 160 Accubonds, and may very well try a box of the DoubleTap Ammo in 160 AB rated for 2,900 fps, if it made 2,850 on the Chrony I'd be OK. I'd just need to verify their actual velocity at the altitudes I hunt to make sure I have a margin of error. The rifle is just a year old, so am still playing around. Don't handload right now.
I have a factory Rem M700 in 280 that loves 140 Fusions, .5 moa all day long, and I have no complaints with that ammo on Deer sized game to 400 or so. If you like data driven decision making, here is a great source for quite a few topics, I sure have learned from this guy. He is all about accuracy shooting, so does not delve into terminal ballistics that I have seen, otherwise , good stuff.
http://precisionrifleblog.com/ Terminal ballistics are a critical part of hunting, often ignored, essentially what happens to the bullet upon impact. There are quite a number of other sites too, accuracy-tech among them.
It's fun stuff.