Here is a little info on the Pumps, it's only accurate up to 1991 though.
REMINGTON SLIDE ACTION RIFLE CHRONOLOGY
1952 Model 760A grade (Tootsie Roll) introduced; No checkering on stock, corncob lines on forearm, dovetailed rear sight, aluminum butt plate. First serial number was 1001, replacing Model 141.
1953 Introduction of ADL grade with cut checkering on high comb stock and five diamond design on forearm, drilled & tapped, grip cap, sling swivels standard. Also BDL Deluxe Special grade offered with select wood. Same calibers available as 760A grade.
1960 Carbine with 18½-inch barrel introduced. Rear sight attached with screws.
1964 New ADL grade with impressed checkering on stock and forearm replaced previous grades. All have Dupont RK-W (Gloss Epoxy) wood finish, grip cap and aluminum butt plate.
1966 Introduced BDL grade with a stepped receiver and impressed basket weave style checkering on forearm and stock with cheek piece in .270, .308 and .30-06 calibers only. Added left hand (buttstock and safety) model in BDL grade. 150th Anniversary model in .30-06 caliber only.
1968 ADL model restyled with skip line press checkering and white line spacers used at black plastic butt plate, black forearm tip and black grip cap. After serial no. 540,773 on 11-26-68, a new serial no. block started and shared with the semi-automatic model 742, starting at 6,900,000.
1974 Rear sight changed to an adjustable ramp configuration. ADL grade checkering design on stock at wrist area modified slightly.
1976 Limited production Bicentennial model with receiver marked with shield and eagle, flanked by scrollwork and 1776-1976, .30-06 caliber only.
1978 New series of serial numbers started on 1-3-78 for 760 B7,400,000 and for 742 B6,000,000.
1981 Model 760 ADL and BDL designations replaced by model 7600 with straight comb stock and impressed checkering. Bolt was changed from fourteen small locking lugs to four larger locking lugs. All carbines discontinued. Introduced model Six with cut checkering on a monte carlo style stock with cheek piece and cartridge head medallion on the bottom of receiver designating caliber of rifle. All warehouse stocks of model 760 were exhausted by April 1981.
1985 Sportsman 76 model in .30-06 caliber with plain hardwood stock introduced. Model Six in .308 caliber introduced.
1986 Model Six in 6mm caliber discontinued. Limited run of carbines in .30-06 caliber only.
1987 Model 7600 carbine with 18½-inch barrel in .30-06 caliber made standard. Limited run of rifles in .35 Whelen caliber.
1988 Model 7600 becomes the second factory rifle chambered for .35 Whelen caliber. Model Six and Sportsman 76 discontinued. Last year to receive RK-W Gloss Finish and white line spacers.
1989 Stock and forearm restyled with satin finish and discontinued use of all white line spacers.
1991 Stock and forearm restyled with cut checkering pattern and monte carlo style stock. Gloss finish offered in .270 and .30-06 calibers only.