So … I think I have a terrible terrible idea that I kind of want to actually do?
I love the 400 Whelen and have had two rifles that where suboptimal in feeding and reliability.
What if I used 240 Weatherby brass and slowly necked it up to ,410 and shot 400gr bullets out of it? Belt fixes any headspace issues?
Is this a new(ish) idea? Any thoughts on if it’s doable? I could even get a run of 1000 custom brass possibly?
I love the 400 Whelen and have had two rifles that where suboptimal in feeding and reliability.
What if I used 240 Weatherby brass and slowly necked it up to ,410 and shot 400gr bullets out of it? Belt fixes any headspace issues?
Is this a new(ish) idea? Any thoughts on if it’s doable? I could even get a run of 1000 custom brass possibly?

Most are. Hard to find or unobtanium brass with correct headstamp. Few if any options for quality bullets and usually fewer bullet options. Custom reamer required. Custom/special order dies required. Smaller market and greater depreciation when it comes time to sell. That's the reality. Don't misunderstand, I've messed with a few and enjoyed the education. But, just about every caliber niche and nuance is filled or has been done or tried.