ok I was going to suggest this earlier but kept mum....
take .30/06 data 7.62mm
take 280 data 7mmand a bit
take 270 data 7mm
take 25/06 data....ummm6.???
look at max charge weight with powder of choice with same projectile weight and you SHOULD be able to pretty well "slot" in side with your cartridge.....
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