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Yep - a friend of mine had a standard 280 which he recently had rebarreled to 284. His results so far with the new barrel have been very pleasing. Here's what he told me:
Yes mine was standard .280,...

Sounds like you've answered your own question! Go for it ��

If you're a long pointy plastic tipped bullet fan then 284 all the way.

284 brass is available from Peterson via Workshop Innovations.

284 will give you the room to seat long pointy bullets...