I'll add my $.02 worth. For my cottage / lake / bush / truck battery, I put together the following switch barrel rig on an H & R Handi-rifle frame.

.220 Long Rifle
.45-70
12 gauge rifled
12 gauge 3" shotgun
.50 muzzleloader
I want to pick up a .357 Magnum barrel for it as well.

The rest of my current "battery" consists of:

Ruger Model 77/22 with Zeiss (4 x 36)
Remington 700 Custom Switch Bbl (223 Rem BRSS, 6BR SSLV, 6BR SSHV, 308 Win SSHV, 243 Win sporter)
Winchester 1894-1994 Centennial High Grade (30-30)
Winchester Model 1894 Pre-'64 Carbine (30-30)
Henri Dumoulin #4 Grade DeLuxe (30-06) (Zeiss 3-9)
Ruger #1A Light Sporter (30-06) (Nikon 2-7)
Remington SPR 22, Double rifle (30-06)
Norinco, 56, SKS-D (7.62x39)
B.S.A. Co., SHT. L.E. II, Sporter
E.J. Churchill Gunmakers Ltd., #1 Mk III* Sporter
Parker Hale SHT. L.E. III*, Sporter
B.S.A. Co., SHT. L.E. III, Sporter
Lee Speed sporter
Enfield, #4 Mk 1,
W.J. Jeffery & Sons Ltd., Martini-Enfield,
Lee Enfield, L.E.C. 1 sporter
B.S.A. Co. Lee Speed, LLE,
Alexander Martin, L.E. 1, Sporter
Lee Enfield, L.E. 1 Sporter
Marlin, 1894C (357 Mag / 38 Spl)
Holland & Holland Limited, #4 Lightweight, #4 Lightweight (318 NE / 30-06) (Zeiss 1.5-6)
W.J. Jeffery & Sons Ltd., #4 (375 H & H)
Harrison & Harrison (Gunmakers) Pty. Safari (416 Rigby)(Kahles 1.1-4)
Winchester Model 1894 Big Bore Custom (444 Marlin)
Ruger #1S, Medium Sporter (45-70) (B & L 1.5-4.5)
Browning, 98, Euro-Bolt (458 Lott)
Lang & Hussey Ltd., Imperial, Best grade Sidelock ejector (12 bore)
James Kirk Gunmakers Ltd., BLE, Best grade Boxlock ejector (12 bore)
J. Blanch & Son (Gunmakers) Ltd., Best Grade Sidelock Self-opener (12 bore)
Browning Arms, Citori, Grade VI (12 bore)
B.S.A. Co., Supreme, Boxlock ejector (12 bore)

Having recently passed the 1/2 century mark, I'm going to start pairing the list down to spend more time shooting & less time collecting.