Deer Hunter: The 2005 Season is a hunting simulator that was advertised as delivering a realistic hunting experience, including an accurate depiction of firearm ballistics. Alongside its base weapons, the game also features a mode that allows to customize the various guns at their disposal, being able to change their designs, optics, and even the caliber of the gun--regardless of whether or not that particular weapon was ever offered in that caliber or not. Although each "official" gun has a default setup and caliber, these can largely be changed by the player, and several official variants exist as well. The caliber choices for the specific types of weapons are listed below:
Rifles (Semi, bolt, pump, and single shot): .207 (Possibly 5mm Pickert?), .223 (Also listed as 5.6x45mm), a 100 grain .243, .257 Roberts, .264 Magnum, .270, .30-06 Springfield, .30-30 Winchester, .300 Winchester Magnum, a 165 grain .308 Winchester, a 270 grain .375 H&H Magnum, .45-70 Government, 6.5x55 Swedish, and 7mm Magnum. (Note: The Lone Eagle can be chambered for all of these except 6.5x55 Swedish)
Shotguns (Pump and double barrel): 000 Buckshot Load, 0 Buckshot Load, no. 4 Buckshot Load, Rifled Slug Load, and a Sabot Slug Load (Though not specified, these are all likely in 12 Gauge)
Muzzleloader: .45 Ball, .50 Ball, and .54 Maxi-Ball
Revolver: .44 Magnum, .41 Magnum, and .357 Magnum
In addition to being able to customize a weapon's caliber, players can also calibrate the gun to work at specific ranges, with each caliber having a suggested range, although it can usually be calibrated below or above the suggestions. Also, all firearms (and the crossbow) except the muzzleloader can be fitted with various optics, camouflages, wood and metal finishes, and custom engravings or woodwork. Of the latter two, few options are available for most guns, but templates exist in the game's files to create custom looks for the weapons with relative ease. Custom camos and reticules can also be made, with the only limitation being the location of the designs and the wood and metal finishes, the latter two of which cannot be customized further than what's available in the game.
As such, compared to some hunting games, Deer Hunter allows players to generally build the hunting weapon of their choice, with the available base firearms having little in common with their real life counterparts besides general appearance and action function.
Handguns
Magnum Research Lone Eagle
The Magnum Research Lone Eagle, loaded with possibly fictional ".207" caliber by default, is one of the two handguns available in the game, referred to as the "Single Shot Pistol." The Lone Eagle is also very limited with its visual customization, with the only visual modifier being a change from the stainless finish to a blued finish. Some of the options can be expanded on with user made modifications, however.
Colt Anaconda
A Colt Anaconda with Pachamyr grips serves as the obligatory "Hunting Revolver" gun, and can be customized with a blued finish. The grip medallions and the barrel engravings can also be customized. The revolver, for whatever reason, lacks any kind of rear sight.
Rifles
Winchester 1885 High Wall (Hybrid)
A rifle loosely based on a Winchester 1885 High Wall (With elements of a Thompson Contender rifle or a 6PPC Falling Block and the receiver of a gate-loading rifle) is a selectable single-shot rifle. The default rifle is chambered in 7mm Magnum and features a 4x12 scope.
Remington Model 572
The Remington Model 572 is available, simply referred to as the "Pump-Action Rifle." Despite being a .22 LR platform, the weapon can be customized to accommodate any caliber except .22 LR. Its default loading is .375 H&H Magnum.
Marlin Model 336
A lever-action rifle resembling a Marlin Model 336 carbine (or similar, possibly even a Winchester Model 64 or a Marlin 1895) appears with three different "official" configurations including an unscoped 6.5x55 Swedish version, a .270 Winchester version with a 4x12 scope, and a .308 rifle with a thermal scope (the only official gun to carry one).
Winchester Model 70
What appears to be a Winchester Model 70 (or closely based upon) appears as the game's all-purpose bolt-action rifle. It's available in two configurations, including a scoped variation in .270 Winchester and an unscoped version in .30-30 and a mossy green camouflage.
"Autoloader"
An unscoped semi-automatic rifle called the "Autoloader" is available, appearing to be somewhat loosely based on Mossberg's line of .22 Plinkster rifles or even some kind of air-rifle. The removable magazine appears to be for a slightly larger caliber, however, although it may have been purposely modeled slightly larger for the sake of the larger calibers it can be loaded with. By default, the rifle is chambered for the mysterious .207 bullet.
Shotguns
Remington 870 Wingmaster
A Remington 870 Field Gun variant, largely based on an 870 Wingmaster, with rifle sights and rather ornate looking wood furniture appears as the game's sole pump-action shotgun. The shotgun can be fitted with optics, including the game's 2x magnification scope, and both the metal finish and ornamentation can be customized to the player's liking.
A hammerless 12 Gauge Double Barreled Shotgun is available and capable of the same loads as the 870. It is one of the few firearms incapable of mounting an optic. Loaded with 0 Buckshot Load by default.