Since the older thread is closed, I have decided to chime in. Not that is matter to me a whole bunch unless it becomes more and more common with ammunition. The 3 areas they were supposed to improve, either a epic fail, didn't do it or both. Here is why:
I noticed that when i loaded white box (not usa branded) winchester 38+p, i was getting this issues that were beaten to death in the closed thread. I used my micrometer/caliper to measure those rims and they had a wide variance from 0.434 to 0.438. Now I could push the last round in most of the time but it was difficult to extract unfired rounds if I did. Now to I got interested and tried the other brands I have, which included: UMC 38+p 125 grain hollow points, all measured less than 0.435, no issues, would fall with out using the ejector, i moved on to federal standard 38 158 grain round nose lead, measure up to 0.436, no issues, fall right out, I then went to my magnum loads of sig sauer elite 125 self defense ammo, perfect, drop right out, then on to barnes vortex hunting loades 140 xpb bullet, same, fall right out, then on to remington HTP 158 grain soft points, same result, no binding all fall right now. So it leads me to conclude that my particular 7 shooter is limited to 0.436 and lower for flawless function, which is a tad better than the original guy who measured his blazer brass at 0.436 and had issues. When I contacted Underwood and talked with them about hunting loads and mentioned the rim diameter issues, they even recognized that firearm companies squeezing that 7th chamber has caused the ammunition industry to take note and the starline brass they use is 0.432-.433, straight from the horse's mouth.
This leads me to believe that Ruger has indeed not fixed their "issue" (if you want to call it that). Now why do I say that, the answer is I called and gave my serial number to see when it was made, well it was shipped to the FFL in November 2018, well after the issues were brought to Ruger's attention. When I mentioned that it was a known issue to the CS rep, she acted like she had never heard of it, and mentioned all she had to do was research the net and she would find that it is known and then I asked if I could speak to someone else more in tune with the GP100, she acted like no one would know anything she didn't know. Instead of arguing I just said "ok". So what do you choose to do here, send it to them, let them tell you its in spec or trade it out for a 6 shooter (which i don't mind, but if i am trading i want to be able to see the firearm before i say ok!!). That's the part that bothers me, I love to inspect my purchase before I buy it. I did with this 7 shooter, nicely made revolver, so I bought it. The other option is to just live with the fact it can't currently shoot all ammunition without difficulty.
So whoever is making the list of ammo that had caused binding, add winchester white box 38+p 125 ammo to it. So far, my particular revolver doesn't seem to have as tight a tolerance as the original complaint, but it still isn't far off. Ruger hasn't fixed it guys, so either wait, or just know that its not going to accept everything out there. For me, I don't really want alot of aggravation, so unless I run into more brands that give me fits, I am not going to worry about it. Just passing my experience along.
I noticed that when i loaded white box (not usa branded) winchester 38+p, i was getting this issues that were beaten to death in the closed thread. I used my micrometer/caliper to measure those rims and they had a wide variance from 0.434 to 0.438. Now I could push the last round in most of the time but it was difficult to extract unfired rounds if I did. Now to I got interested and tried the other brands I have, which included: UMC 38+p 125 grain hollow points, all measured less than 0.435, no issues, would fall with out using the ejector, i moved on to federal standard 38 158 grain round nose lead, measure up to 0.436, no issues, fall right out, I then went to my magnum loads of sig sauer elite 125 self defense ammo, perfect, drop right out, then on to barnes vortex hunting loades 140 xpb bullet, same, fall right out, then on to remington HTP 158 grain soft points, same result, no binding all fall right now. So it leads me to conclude that my particular 7 shooter is limited to 0.436 and lower for flawless function, which is a tad better than the original guy who measured his blazer brass at 0.436 and had issues. When I contacted Underwood and talked with them about hunting loads and mentioned the rim diameter issues, they even recognized that firearm companies squeezing that 7th chamber has caused the ammunition industry to take note and the starline brass they use is 0.432-.433, straight from the horse's mouth.
This leads me to believe that Ruger has indeed not fixed their "issue" (if you want to call it that). Now why do I say that, the answer is I called and gave my serial number to see when it was made, well it was shipped to the FFL in November 2018, well after the issues were brought to Ruger's attention. When I mentioned that it was a known issue to the CS rep, she acted like she had never heard of it, and mentioned all she had to do was research the net and she would find that it is known and then I asked if I could speak to someone else more in tune with the GP100, she acted like no one would know anything she didn't know. Instead of arguing I just said "ok". So what do you choose to do here, send it to them, let them tell you its in spec or trade it out for a 6 shooter (which i don't mind, but if i am trading i want to be able to see the firearm before i say ok!!). That's the part that bothers me, I love to inspect my purchase before I buy it. I did with this 7 shooter, nicely made revolver, so I bought it. The other option is to just live with the fact it can't currently shoot all ammunition without difficulty.
So whoever is making the list of ammo that had caused binding, add winchester white box 38+p 125 ammo to it. So far, my particular revolver doesn't seem to have as tight a tolerance as the original complaint, but it still isn't far off. Ruger hasn't fixed it guys, so either wait, or just know that its not going to accept everything out there. For me, I don't really want alot of aggravation, so unless I run into more brands that give me fits, I am not going to worry about it. Just passing my experience along.