Used them in practice loads running 750fps and 230 CPRN. Standard primers (small and large) mixed brass. For that slow load not any appreicable difference. In hotter loads - maybe someone else has experience to report.
Looking at the twist for the Sauer 100, same as they use on the 6.5x55 Swede. I suppose 140 grain and lighter will work fine for that twist. The 20-inch barrel is fine too - this rifleshooter test showed some loss of velocity but not much.
https://rifleshooter.com/2019/03/6-5-cr ... city-2019/...
+1 on the Burris. I have a Burris 3-9x40 Ballistic reticle on my 7mm-08. It’s weight is light for the quality. I can see well through it for the price range.