Does a Marlin 1895g 45-70 with the ported barrel serial number 01022916 have ballard or micro groove rifling and what is the year of manufacture?
It is Ballard style rifling, and should date to 1999. The year of manufacture is 2001. 1st 2 digits of serial # correspond to the year it was made. Ballard rifling is correct.
What year did Marlin transition from Microgroove rifling to Ballard style in the 444 SS and did Marlin produce the 444 SS with Ballard rifling in a 1 in 38 twist or just 1 in 20?
Not sure when they went from micro-groove to Ballard type but they went to micro-groove rifling around 1954,a 1 in 38 twist is standard for most .44 Magnum &.444 but with some ammo makers making factory loads that use bullets that weigh more then 240grns. in weight buy a Ruger Deerfield simi-auto .44 magnum or their lever action .44 magnums because they have a rifling twist of 1 in 18 that will stabilize the heavier…