That is all correct info. It is std length magazine box with a 21" barrel. As CAS stated, there is no issue with bullets up to 140 gr. NP and maybe beyond. I have used mostly lighter bullets in the 120-129 gr. range in mine as the whole mess has a wet weight of 4lb. 14.5 oz and can slap you a bit. The 21" barrel delivered velocities in excess of what we usually see quoted for the .260 in 24" tubes. I think that sometime we worry waaaay too much about an inch of barrel plus or minus.
FWIW....I have a Wyatts box on a .284 win that is possibly the best light rifle I have ever owned. Given the bullets/powders that I use, I probably would not do that again but YMMV on that one.
Having said allllll that "stuff" I think the .260 is pretty good just the way it is and unless there is an issue with the chamber, I just don't see much need to punch it out or "improve it.
there again....YMMV
JimF
