I bought a GP-100 when they first came out...WAYYYYYYYYYYYYYYY back in the late 80's. I thought it would be a great revolver for hunting the ever elusive whitetail deer in the southern half Michigan, where one can use only a handgun or shotgun.
It was beefy, therefore better to handle 180 gr jsp's I intended to use (I didn't want to beat up my beloved Smith & Wesson Model 19). It was stainless steel, and had a decent set of grips. I had also considered a Smith Mod 686...but the Ruger was almost a hundred bucks less money. This was a concern for my college student budget.
I took it to the range, and started firing from the bench to get an adjustment on the sites. The BEST I could do were 5-inch groups at 25 yards! I was mortified. Nothing came close to point of aim. The trigger was also NOT a Smith trigger.
I tried different loads, and bullets, handloads, and more factory fodder. I couldn't make this big thing work for me.
I got rid of it, and ate mac & cheese for 2 weeks, and bought a 6" Smith & Wesson Model 686 with the target hammer, target trigger, and red ramp, white outline setup. I put on a set of ROPER grips, and VOILA...I shoulda done it this way the first time.
The 686 shot into 1 1/2" offhand at 25 yds, sometimes into under an inch from the bench. It still shoots like that. I take it to Michigan every year for deer season (where I will be in a week).
I am not bashing Ruger. I have 3 10/22's, and several Mk-I's, II's, and III's, and even a Single Six Convertible. But I am not impressed with their DA wheelguns.
Though my late father had, and I now have, a 3" SP-101 .357 that isn't bad, but it is too heavy for a good BUG.