Nice rifle. The Model 30 Glenfield is a plain version of the Marlin 336C. It was made 1966-1968. It uses a walnut finished hardwood stock and forearm instead of walnut- a bit plainer, but shoots just as well. If you post the serial number, can MAYBE tell you which year made. Good deer rifles out to about 200 yards. If you have not done so, try the Leverlution ammo.
What we have here is... failure- to communicate.