Caliber Selection for LA Magnum Build - 28 Nosler?

[Desert_Racer]

I've finally started amassing parts for a long action magnum build that I've waited years to do. The purpose is to shoot steel at longer ranges (1500+). I am deliberating over caliber selection, however. Ideally, I would like to get somewhere between 1200 to 1500 rounds of accuracy before needing to dump the barrel. As I understand it, the 300 WM fits this bill and the 7mm Mag fits in the lower end of that spectrum. I have, however, taken interest in the 28 Nosler for its velocity increase over the other two and the impressive BC of the 7mm 180gr ELD Match (.796 G1/.401 G7 as advertised). Data on the 28 Nosler is limited on both google and the search function of the new site, but I assume it falls well below that barrel life window. I will not be shooting long strings. Can anyone shed some light on the 28 Nosler (predicted barrel life, accuracy, ect) or point me in a better direction?

Current parts I've acquired so far:

Stiller Tac 300 (Mag bolt face)
Bartlein 7mm Heavy Palma 9.6-8.7 gain twist blank, (planning on 28" finish length)
Jewel HVRTS trigger
Most likely going with a KRG W3 or MPA BA chassis

 

[3rdfocal]

Doesn't get much flatter than the 28 nosler with a 195. I had one for a bit, custom build on a surgeon action and very accurate. The problem I had was brass only lasting 2 firings. No pressure signs other than the brass wouldn't hold primers. Got very expensive to shoot. My barrel was an 8 twist. I'd do a 7saum if I did it again.

 

[ChadL]

I built a 280 ackley last year. I really enjoy the cartridge, but if I had to do it over I would've built a 28 nosler. Specifically around the berger 195 otm bullet (1:8 twist is a must if you go with the 195 otm). With the velocity the 28 Nosler gets you get near .8 ballistics. It's like the two were built for each other. Yes, the 195 otm is a hunting bullet, but will bang steel very well too. Barrel life seems to be decent for a magnum. Barrel life seems to be similar to the non-magnum 6.5x284, but like you said the info is a bit limited. With that said, not shooting long strings will certainly help maximize barrel life. Not running to the absolute velocity limit will help too as I'm sure you know.

 

[lennyo3034]

I'd be a little concerned about your barrel twist. Hornady's BC numbers are for a 1-7.5 twist.

 

[Desert_Racer]

I'd be a little concerned about your barrel twist. Hornady's BC numbers are for a 1-7.5 twist.

I'm not that concerned. Per their website, its still a .777 G1 BC out of an 8.75 twist. I should be able to push them around 3200 fps at my altitude without much trouble.