RCBS AmmoMaster-2 Single Station Press – 7/8"-14 & 50-BMG Conversion

Große Single-Station Press · RCBS
AmmoMaster-2: plenty of workspace for long and large cartridge builds
The AmmoMaster-2 is a large single-station press for reloaders who value workspace, lever reserve, and a sturdy workbench more than compact dimensions or maximum throughput. It comes standard set up for common 7/8″-14 dies; using 50-BMG requires the separate RCBS configuration designed for it.



Fits well

for very long or large cartridge builds
when plenty of free workspace at the press is a key purchase factor
for controlled single operations instead of high volume production



Fits less well

when mostly short standard cartridges are processed
with limited workbench space or short lever travel
if a multi-station or progressive solution for high throughput is sought



Purchase-critical points


Die interface: The head plate uses 1 1/2″-12; the standard setup is for 7/8″-14 dies.

Large caliber: The press alone is not a complete 50-BMG system. The appropriate separate RCBS die/conversion setup is required.

Workspace: The long lever and size require a stiff, load-bearing workbench with enough free movement space.

Process: As a single-station press, it prioritizes control per step over piece rate.

Features and practical impact


Large workspace RCBS publishes depending on base
e 7″ or 7 3/8″. The decisive factor for the purchase decision is this: The press offers significantly more space than typical compact presses. For a mounting-relevant measurement question, the delivered version should be decisive.

1.5″ ram The large-dimensioned guide supports the design intended for long working strokes. This is especially relevant for long setups, not automatically an advantage for every standard application.

17.5″ operating lever The long lever provides mechanical reserve but requires free swing space and stable mounting.

Modular design Standard shell holders and 7/8″-14 dies are the normal basis. Larger configurations must be explicitly intended for the respective RCBS application.

Limits, disadvantages, and avoiding bad purchases The AmmoMaster-2 is large, primarily designed for workspace, and not automatically the more sensible choice for standard calibers. If you mainly want to work compactly or produce large quantities, you should compare a smaller single-stage press or another press concept. More leverage does not replace suitable components or checking for unusual resistance or mechanical anomalies.

Technical data with practical interpretation

Design Large single-stage press – high control, lower throughput than multi-stage systems.

Working window 7″ to 7 3/8″ according to RCBS documents – especially relevant for long cartridge/die setups.

Head plate 1 1/2″-12 with insert for 7/8″-14 – standard dies usable, special configurations separate.

Ram diameter 1.5″ / 38.1 mm – large-dimensioned guide.

Lever length 17.5″ / 444.5 mm – lots of leverage, plan accordingly for space.

Manufactured in USA.

Manufacturer no. 88703.

Scope of delivery

RCBS AmmoMaster-2 single-stage press
Operating lever
Primer catcher
Ram Priming Unit for small and large primers
Operating manual

Dies, shell holders, 50-BMG die set, components, powder scale, and powder measure are not included.

Safe use The press must be mounted firmly and securely. Before use, check the die, shell holder, lever attachment, and moving parts for correct fit. If there is unusual resistance, binding, visible damage, or noticeable play, do not continue with additional force but check the cause and setup.

FAQ Which dies fit as standard? The standard insert is intended for common 7/8″-14 dies. Caliber, die type, and shell holder must fit the specific application. Is 50 BMG fully covered directly from the factory? No. The appropriate separate RCBS configuration is required for this; the press alone is not a complete 50-BMG loading system. Why is the press so large? The main benefit lies in the large working window and long lever stroke. This helps with long or large-dimensioned setups but costs bench space. Is it intended for high quantities? No. As a single-stage press, controlled individual operation is the focus. Other press concepts are usually more suitable for high throughput.

Black-Raptor conclusion: The AmmoMaster-2 is a specialist for lots of workspace and lever reserve. It makes sense when exactly these reserves are needed – not as a generally “better” standard press.