"My 7mms like the Winchester 175 grain RN and my Swedes like the 160 grain RN bullets."
I thought Winchester dropped the 175 gr. RNs a long time ago.
When I had a 6.5x54 MS, it was very accurate with 160 gr. RNs. Somebody stole it DAMMIT!
I've just started playing with 170 gr. RNs in my 7x57 and they are shooting quite well. I have about 500 of the long discontinued 170 gr. Sierra RNs that I found at a gun show and about 200 rounds of the 175 gr. Hornady RNs that I haven't tried yet. I have a neat custom 7x57 mauser with a semi-European style stock with a schnable foreend that is dead nuts accurate with Winchester 145 gr. factory ammo. I've been shooting the 170s in a Winchester M70 Featherweight push feed and with a factory duplication type load get .375 to .75" groups depending on my shooting ability on the day I'm shooting. My other 7x57 is a Ruger #1A but it's only good for 1.25" groups in the few loads I've shot in in it. The more I shoot the 7x57 the more the others stay home.
I do prefer spitzer style bullets most of the time in the 7x57s but am considering the 170/175 gr. RNs just to see why the 7x57 attained it's reputation as a great game killer.
Paul B.