M1919 - that is quite a collection of fantastic .22s!! and Fiddy those Mauser's sure can shoot - I have had some of my better days shooting those in iron sight matches and would think they could keep up with any quality .22 - wish my eyes could take advantage of that - I'll have to try and get that ES350b back up with the scope attached and see!!
....and K22 my Mauser 201 today reflects what you were talking about - shot about a 3/8" group sighting in for the score target and then proceeded to shoot a 70 I rarely miss a squirrel with this rifle but its usually less than fifty and the head is a little bigger than these dots . Although my EXCUSE is the scope is my favorite Leupold 6X compact with Leupold Dot which was larger than the target dot and by the time I figure out what my sight picture should be I was just about done - although that doesn't explain that last shot!!
Next was an Anschutz 1710 with 6..5-20X EFR did pretty good and I pulled the one for sure the other one??
Last today was a Remington Model 37 with Redfield 3200 (16X)
Pretty sure based on the Mauser that my favorite squirrel rifles will probably be in that 70 range - but we will see