let's count with guns and gun terms.

[ApacheCoTodd]

Winchester 363

Air pistol

 

[blarby]

364 model 26t target rifle/shotgun

 

[WestKentucky]

Coast to coast 367 pump 12 ga

 

[Cee Zee]

HK Fabarm Lion H368 3" 12ga semi auto shotgun

 

[WestKentucky]

.369 Purdey, it looks like an African game rifle to me. This is for sure a Google find.

 

[JeeperCreeper]

.370 Sako magnum... if its even made anymore

 

[Sergei Mosin]

We appear to have skipped a couple of numbers, so...

Remington Model 365 Mini Dehumidifier (advertised for use in gun safes)
Hornady 366 Auto Progressive Reloader

Back in order:

M371A1 HEAT round for 90mm recoilless rifle
Galil Model 372

 

[ApacheCoTodd]

.373

Shoulder diameter of the 7.62x25.

 

[Cee Zee]

374 is a tough one but there is CA SB 374, the law vetoed by Gov. Brown in California that would have banned semi-auto guns.

 

[Legionnaire]

.374 = base and rim diameter of a .380 ACP
.375 H&H Magnum
.376 Steyr

 

[ApacheCoTodd]

.377 Barnes

38-55 WCF 255 grain projectile.

 

[TMR]

378 Weatherby.. you guys let me have an ez one cause I'm a little slow...

 

[pillage]

Lee 2-Cavity Bullet Mold 379-250-RF 375 Winchester, 38-55 WCF (379 Diameter) 250 Grain Flat Nose

380 ACP

 

[Legionnaire]

381mm / 50 Model 1934 naval gun

 

[ApacheCoTodd]

m-382

Practice grenade round, 40mm.

 

[Cee Zee]

Bersa 383A

 

[ApacheCoTodd]

Rexio Pucara 384

.38 Special

 

[WestKentucky]

M385 40mm propelled practice round.

 

[CLP]

Smith & Wesson 386

 

[Legionnaire]

Sears 387
Sears 388

Both .22 rifles manufactured by Mossberg.

 

[ApacheCoTodd]

389

Savage combination gun 12 Ga/.308 or .222

 

[Cee Zee]

Beretta Model 390 shotgun
Beretta 391 series shotguns

 

[WestKentucky]

Benjamin 392 air rifle

 

[Sergei Mosin]

LST-393, a preserved WWII LST (Landing Ship, Tank) - lots of guns aboard
M394 90mm blank cartridge
Mossberg 395
S&W Model 396
Benjamin Model 397
M398 launch vehicle for MGM-18 missile
Warren Commission Exhibit 399 (look up "single-bullet theory")
SIG Sauer M400
.401 Winchester Self-Loading
Mossberg Model 402
.403 cast bullets for 45-70 and 38-40
.404 Jeffery
.405 Winchester
406mm (16-inch) naval guns

 

[WestKentucky]

407mm barrel length on the steyr aug.