No, it won't fit. The .45 caliber bullet is 0.45" in diameter; the .30 caliber bullet is .15" smaller. The brass is different size too.
No
Yes
Marlin
.223
there is a marlin collectors site or gunbroker.com
30
1990
1984
Not enough information given to answer this question.
By including the serial number in your question,we will be able to answer when your Marlin model 336 was produced.
the cost 3030 cal 336sc
All depends on condition, model, accessories,...etc.