Lock-N-Load® O.A.L. Gauges
Regulating seating depth and the resulting "jump" to the rifling is widely regarded as fundamental to improved accuracy. A few thousandths of an inch change between the bullet and the rifling can make the difference between average accuracy and real tack-driver performance.
Product Line
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 #C1000For 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 #C1550For 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
Modified Case and Adapter D for 17 Hornet Item #A17H
"A" Series
"B" Series
"C" Series
* = 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 $20.00 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