I cast 22,25,26,27,28,30,31,32/8mm ,35/38/9mm , 36/375 , 40 , 45454/458 , 50 and a .690 .
I'll buck the trend a little and sprinkle a little heresy on it .
I love the 7×57 , but like the 6.5s there aren't many slow twist barrels around unless you dumb luck into a 1-11 7mm which is plenty of the 150 gr class bullets they are just to fast to get the most out of them unless you use all of the twist ........the old Mt Molds software ran the 8.5" 7mm out to a 250 gr bullet still stable .........
The 270 cal swings the other way with lots of 10&11" twists which is why the 270 Win only goes to 150 gr . I have a Savage barrel made by AR performance in 5r at 20" for the 6.8 SPCII the NOE 279-124 at 75/25 WW-20-1 and .5 soaked up copper with checks seated at .280 over 23.3 H322 gives 2250+ fps MV and carries just over 1000 ftlb past 100 yd . FC brass with CCI 450 of #41 . Recoil is low , barrels come in 1-10 and 1-11" . The down side is the bolt face . It's the same as 30 Rem , a x39 or 35 Rem might work well enough , but there is another way . Use 22 Nosler brass , it's the same case with a 223 rim .
I like the 257 Roberts , 7×57 but they don't fit in a short action . If you have a spare 95 Mauser laying around your hooked up though for a nice little grocery getter .
I don't know what it is about the 243/6mm I just can't warm up to them .
308 , 300 Sav 1-12" 150 - 175 gr RNFP about 2200 fps or a 1-10" and a 230 about 1900 fps and you're there at the 1000#@100 . Light short action should be pretty docile to shoot . A youth Axis is about $200 , but the stocks suck .
The old 325 and 340 Savages shoot well and come in 30-30 . A case full of 4350 and you have a 150-170 gr bullet at 2100+ fps
I do like the 358 Win although I'd have rather it were a 9×57 . A 35-250 or 358-200 can be run full jacket speeds in the 358 and while it's a little much for pronghorn , but elk , moose , or bear should die just fine with a 2100 fps 250 which a lot more comfortable in a 8.5-9# 98 Mauser that a 7.5# 1895 . You can of course shot 95-158 gr pistol designs as well .
If you have the 260 Rem in your wish book , I can't believe it saying this , the 6.5 CM will be easier to find most likely has a slower twist like a 1-10 , the 265-140 NOE should work well . I think it's just a necked 250/300 Sav . Form and trim from 308 .