I load .270 Win(.30-06 based) and 7mm Magnum(belted family).
There are lot of similarities.
I use same powders for both. RE19, RE22(heavy bullets, and/or max loads).
I use magnum primers for both.
I use 130gr for .270, and 120gr to 162gr for 7mm Magnum.
I did some full tilt boogie 130gr Nosler Ballistic tips for my brother's Husqvarna 270. It was the first time he complained of recoil for that rifle. They were ~3140fps.
.280(.30-06 based.) is somewhere between 7mm-08 and 7mm Magnum. There is a 280AI(Norma) that is between .280 and 7mm Magnum. 280AI is a SAAMI specification.
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When all is said and done, there is a lot more said than done.
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