Thank you igolfat8 for responding. The below example is not true for all and just happened to be the case at Joe's range on that day. It was the 1st unofficial N50 match with a large number of shooters (10) and different equipment. Participation and interest was high and we had a challenging good time.
The rimfire shooters shot the 1st match together and included is the 1st place pellet (RAW) score. The 4th 22 pellet example is 1st place pellet score of the 2nd match to compare. The CZ is an older box stock pencil barrel of 28", the Anschutz and RAW are modified. Examples shown are experienced shooters. There were no slug-guns.
As can be seen the scores are similar. In fact if Dennis had shot his average rather than 237 on his last card his score would have been 740 - high score for the day. Edit: I should have added Chris' (an inexperienced shooter) 1st match score. He shot 715 (not shown), but if he had shot his average on his 1st card his score would have been 723 with a borrowed .177 Thomas.
22LR vs 22 pellet examples
Allowing "any" rimfire was our nod to the many older target 22s hiding in safes not used. Thus, Model 52's. Kimber's, Martini's, 40x's can shoot next to modern Tikka, Savage and CZ's and Air Slug guns. From experience allowing nearly any rifle and rifle modifications will not inform you when to 'not' to pull the trigger.
We believe the scores will be competitive when shooting against all variables including the elements - we will see how it plays out.
Lou