snapping turtle
Grandmaster
(**** this got long) love the JM circled marlins.
That would be a waffle top sporting carbine or in barrel marked terms a 336SC 35 rem. The marking for a full tube will be 336 RC 35 rem.
Microgroove in 35 rem works well unless you want to shoot downloaded chunks of lead instead of copper coated bullets. Some of the 35 rem microgroove marlins have a ton of grooves in the barrel. I think when marlin was still using the hook cut Ballard rifles they were 7 grove in 35 rem. I took lots of time to cut the barrels. About 45 minutes on a 7 groove barrel each.
Microgroove barrels came around in 1958 on center fire rifles. In 35 rem there were 16 grooves In The bore. In 1968 they changed the 35 rem to 12 grooves. The 30-30 started at 16 grooves in 1955. 22 grooves on 1958-1968 and then 12 grooves post 1968. Rifles barrels took minutes to cut not half hours. Maybe a production cost cutting measure but I think it worked very well.
I have shot many 1958-1968 marlin 30-30 ‘s and many of them shoot lights out. The grooves are a little thinner and less deep. I purchased a couple that had been poorly cleaned. Sometimes just copper clogged and a couple that had been molested with a cleaning rod and the grooves had been deformed (maybe a worn out wedge cut barrel from the factory going out of tolerance also). These shot well but not lights out. The original 1960 I still have was copper fouled pretty good. I spent lots of time until the patches came out without copper. I think that rifle was a deer gun. Shot during season and quickly cleaned and put away. I don’t think any copper was removed from the barrel before I purchased it in the 1980’s. It will shoot with bolt guns at 100 yards. Looking down the bore now is like a prism with 22 grooves in 30 diameter barrel.
I have another 35 rem RC that the owner was selling that he said misfired or lite strike on the primer. 100 dollars back in the day took it home. Since the 35 rem rests on the shoulder not the rim the chamber on this one is a little long. First I replaced springs and such. Once in a while chick no bang. And maybe a very small dent or no dent on the round. Hmmm. Was about to resell it off and a reloader told me to being him some fired cases For his marlin load to test the ammo. Seem the once fired (or several times fired cases never had an issue going off. He measured and yes this rifles chamber is a little deep. Once the rounds were fire formed to the rifle no issues. The shoulder was just deep.
Marlins in 35 rem can be a little picky as the round is great but was made for auto rifles no lever actions. I think marlin did a good job making stuff back then but tolerance issues during a run effected some rifles.
<--- heavy sigh
