Ive got a 20" 300saum. Its a very efficient case. 3k with 168grn. 3.170k with 150grn. N550 & R17. For my 50-500 yd hunting with the 168 NBT its hard to beat.
Also a 22" 270WSM. 129grn Barnes LRX 3.330k with R19, 3.250k with R26
There're plenty of 7saum around with 20" getting 2.9k with 160 grn. My 22" is 3k.
I recall Greg Duley saying you can take a 7mmRM back to 20" ok.
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