Photo of O.A.L. Gauges

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The Lock-N-Load® O.A.L. Gauge is universally acclaimed as the most accurate, easy-to-use and reliable method of regulating seating depth and the resulting "jump" to the rifling.

Straight Model

Item #C1000

For all bolt-action and single-shot firearms, or any firearm with straight-line access to the chamber. This model is preferred, as it is most precise and user friendly.

Curved Model

Item #C1550

For all autoloader, lever-action, or pump-action rifles. Also fits all bolt-action and single-shot firearms. Inserts into chamber through ejection port. Not compatible with Adapter "D" or short-bodied cases.

Achieve precise bullet seating depth.

To use the Lock-N-Load® O.A.L. Gauge, you will need a Modified Case (sold separately) to fit your firearm's chamber and thread it onto the gauge. These specially prepared modified cases are threaded at the case-head and have a .002" oversized neck to accept the same bullets you intend to load.

This is critical, as the Lock-N-Load® O.A.L. Gauge dimensions obtained will be accurate to .001". These results cannot be attained with competitive products, which use a simulated bullet with an arbitrary shape.

Lock-N-Load® Modified Cases

Lock-N-Load® Modified Cases are readily available to fit most popular rifle chambers. All are manufactured to SAAMI specs.

Modified Case and Adapter D for 22 Hornet Item #D1202

"A" Series

Item #
Description
A17
17 Remington
A17H
17 Hornet
A218
218 Bee
A221
221 Remington Fireball
A22
222 Remington
A223
223 Remington
A22M
222 Remington Magnum
A22250
22-250 Remington
A220
220 Swift
A6MMB
6mm Bench Rest Remington
A243
243 Winchester
A6MM
6mm Remington
A250
250-3000 Savage
A257
257 Roberts
A2506
25-06 Remington
A65G
6.5 Grendel
A260
260 Remington
A65C
6.5 Creedmoor
Item #
Description
A264
264 Winchester Magnum
A68SPC
6.8 SPC
A270
270 Winchester
A7MM*
7mm Bench Rest Remington
A7X57
7 X 57mm Mauser
A7MM08
7mm-08 Remington
A280
280 Remington
A7MMR
7mm Remington Magnum
A300A
300 Blackout
A3030
30-30 Winchester
A308ME
308 Marlin Express
A308
308 Winchester
A30TC
30 TC
A300H
300 H & H Magnum
A3006
30-06 Springfield
A300R
300 Ruger Compact Magnum
A300M
300 Winchester Magnum
A300W
300 Weatherby Magnum
Item #
Description
A762
7.62 X 39mm (308/311)
A303
303 British
A32
32 Winchester Special
A8X57
8 X 57mm Mauser
A8MM
8mm Remington Magnum
A338M
338 Marlin Express
A338R
338 Ruger Compact Magnum
A340
340 Weatherby Magnum
A340
340 Weatherby Magnum
A35
35 Whelen
A35R
35 Remington
A350
350 Remington Magnum
A9362
9.3 X 62
A375
375 H & H Magnum
A416
416 Remington Magnum
A450B
450 Bushmaster

"B" Series

Item #
Description
B17R*
17 Remington Fireball
B204
204 Ruger
B6PPC
6mm PPC SAKO
B65X55
6.5 X 55mm Swedish Mauser
B65
6.5mm-284
B240
240 Weatherby Magnum
B257
257 Weatherby Magnum
B270
270 Weatherby Magnum
B270W
270 Winchester Short Magnum
B764
7 X 64mm Brenneke
B7MMR
7mm Remington Short Action Ultra Magnum
B7WS
7mm Winchester Short Magnum
B7MMW
7mm Weatherby Magnum
B7MM
7mm Remington Ultra Magnum
B300S
300 Savage
B300R
300 Remington Short Action Ultra Magnum
B300W
300 Winchester Short Magnum
B300
300 Remington Ultra Magnum
B338
338 Remington Ultra Magnum
B358
358 Winchester
B378
378 Weatherby Magnum
B243
243 Winchester Super Short Magnum
B25
25 Winchester Super Short Magnum

"C" Series

Item #
Description
C6PPC*
6mm PPC .261"
C30378
30-378 Weatherby Magnum
C338L
338 Lapua Magnum
C9374
9.3 X 74R
C375R
375 Ruger
C450*
450/400 Nitro Express 3"
C450325*
450/400 Nitro Express 3¼"
C405
405 Winchester
C416R
416 Rigby
C416RG*
416 Ruger
C450NE*
450 Nitro Express 3¼"
C458W
458 Winchester Magnum
C458L
458 Lott
C470N*
470 Nitro Express
C500N*
500 Nitro Express 3"
C50BMG
50 BMG


* = Limited quantities available.

Custom Case Modification

Any of your brass, including all wildcat sizes, can be custom modified at our factory for use with either gauge. Simply send us two fired cases by mail for quick turnaround.

Please include contact information, two fired pieces of brass (not deprimed or resized, in case there are issues creating the modified case) as well as a check or money order for $15.00 for customers inside the USA. Please make checks payable to Hornady Manufacturing. We ask that you please use FedEx, UPS, or other direct shipping service. Using USPS may result in item returned to sender.

Mail to:

Hornady Manufacturing
Attn: Modified Cases
108 S. Apollo St.
Alda, NE 68810

*Please note we can only accommodate requests for those customers inside the USA, due to licensing regulations for cartridge cases.

For a stuck case in a sizing die, please include a $5.00 check for the return postage, made out to Hornady Manufacturing.

NOTE: Dial Caliper and OAL Gauge not included

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