While on this subject,I must say I'm disappointed.During our winter league I decided to get some Nitros,and STS's,because everyone says they load better.Really????Not by my experience this winter,after 2 or 3 reloads,both showed the same signs of splitting as any Gun clubs I've loaded.Now I'm questioning why spend the extra bucks if the shells won't reload better,or more times than gun clubs.The fella that got me into this sport last year was surprised at what I told him today.3 times is the max so far on them,but I've reloaded gun clubs that many times also.Soooooo,where's the savings by spending more on these shells???Not that it matters,but I reload all with 1 oz. and 18.8 grn dot.You'd think that using a lighter load than what comes in them,maybe they'sd last a bit longer.Only thing they do consistently is good crimps.
The grey aa hulls,I have to readjust a lot of settings on my mec to get them to look as good as remingtons and always seem to have some kind of hole in the center of crimp no matter what adjustments I make.
For me .. on a MEC9000 - the brass base of the STS means a little easier "pull" on the handle compared to the Gun Club. Also, I like how the STS slip into my chamber easier. Occasionally, I will have a Gun Club be a tight fit. Plus, they just "feel and look" better !!
STS has been the hull I have loaded for ten years, with 3dr. Red Dot. When I first used them, AA Winchesters were the hull most used. That was before they changed the plastic. I could buy clay boxes full of once fired STS hulls for $4.00. Then everyone and there brother found out how good they were and Winchester tried to copy them and that was the end of that. I still have hulls from back then that have at least 8 reloads on them and some are just starting to crack at the crimp. I have noticed however that the Nitro hulls do not last as long for some reason. They are also vary in length quite a bit. Some are actually about 3/16" taller than the rest. They catch on the wad guide, of my 366. STS is the best hull to reload in my opinion and has been since I started reloading 20 years ago. Jon