What caliber is the bull-barreled rifle ? (I'm guessing .243)
The rifle with the bull barrel is a Savage .17HMR bolt action rifle.
From top to bottom:
Mossberg 20-Gauge Model 500 (Youth) Pump Shotgun
Ruger 10/.22
EMF Model 1892 Lever Action .357Mag/.38 Special (repro of a Winchester M1892)
Savage .17HMR Bolt Action (Model 93R17)
Browning Citori Lightning 12-Gauge Shotgun with 28" Barrel (Over/Under)
Ruger Mini-14 - pictured with 20-round mag attached (.223)
Mauser 98k Sporterized 30.06 (1938 built)
Mauser 98k 8mm (Mitchell's Mauser, 1938 built)
Springfield Armory M1 Garand 30.06 (1945)
Pistols (left to right)
Dan Wesson Pointman .45ACP (M1911 Government)
Ruger MkII .22, NRA Special Edition
Single Action Army Colt Model 1860 Reproduction, black powder .44 (built by Traditions)
Not pictured above is my Colt M1911 Commander Gold Cup .45 two-toned (I didn't have it when the photo was taken). This pistol was a special version with a limited production of 300. What makes it so unique is it has the special target tuning of the Gold Cup but has the standard non-adjustible blade sights (which is very rare). Here is a pic of it:

If you don't know, the big difference between the Colt M1911 Government and the Colt M1911 Commander is the barrel length. They are both .45 and the magazines are interchangeable. The Government model has a 5" barrel while the Commander model has a 4.25" barrel.