I'd like to try a 38-55; but, not a Marlin. The 32Mag became the gun to have for pistol caliber until everybody realized they had all sent theirs back to the factory multiple times. Then they sold them. Exact same thing with 38-55; except, most didn't mess with the factory just took them to a gun show and traded. If you have a Marlin in 38-55 and it works, you're a lucky man.
Wow! I've so NOT heard this from those who shoot Marlin Cowboys in 38-55 or 32 Mag. I didn't even know I needed a 38-55 until about a year ago. It has become a favorite of mine and would gladly buy another or three if i could get the owners to let them go.
It is a great caliber and I like it for silhouette, targets and all around shooting. I think it will work great as a hunting cartridge too but I have not yet had the opportunity to shoot a critter with it. I am quite confident it will do the job though.
Recovered 250 grain bullets from dry sand backstop.
The 38-55 336 Marlin Cowboy is a finicky. Much of that can be mitigated by using the long (and thin) Starline brass. The chamber in my CB allows me to shoot bullets up to .381" using Winchester Brass. A friend of mine's won't chamber a bullet sized above .379" in Winchester brass - luckily it shoots .379" sized bullets best. With Starline brass he can shoot bullets up to .382", though the .379" have proven the most accurate. Mine likes the .381" best and the Starline brass makes that easy though the thicker Winchester brass will work with bullets up to that size. The Starline brass will chamber (in my gun) bullets up to .384".
The only real 38-55 dies out there are the RCBS Cowboy dies. Others can be made to work but the RCBS Cowboy dies make it easy.
The 38-55 is a caliber for those with the fortitude to explore. There are a lot of old guns and more than a few new guns. Each of those probably has a very individual load preference. Those with tight chambers and big bores will find it very challenging.