I gotta say. Grips that fit your hand make a world of difference.
A splurged on a set of ahrends for my 2.75" m66 on ebay. They looked nice.
I had been struggling to find grips that look good, feel good, and works well with full magnums. I had recently gotten a set of retro target grips for my 4" m19 that worked really well even though they felt thinner.
Yesterday I shot 100 rounds of full power magnums in my m66 and could definitely of kept going. My hand felt as if I had used pachymers..