FAQ
Frequently asked questions
Straight answers about laser powder checks, bullet checks, case presence sensors, and dashboards. Don't see your question? Contact us or call 307-423-9296 — you'll talk to the people who build these.
How does a laser powder check work, and how is it different from a mechanical probe?
Probe-style powder checks (like the Hornady Powder Cop, RCBS Lock-Out Die, or the Mark 7 Powder Check probe) physically lower a rod into the case and infer the charge from how far it drops. That contact is where the problems come from: powder spills, suction pulling powder out of the case, probe strikes on the case wall, and a different probe for each cartridge. An RCM laser powder check measures the powder level with a laser — nothing touches the case or the powder. No spills, no suction, no probe changes, and micrometer-level measurement on every round.
Will it detect a double charge, an undercharge, AND a no-charge (empty case)?
Yes. The laser measures the actual powder level in each case, so it flags anything outside the window you set — undercharges, overcharges, double charges, and empty cases alike. On Mark 7 Autodrive presses the Pro models stop the press automatically the moment a charge is out of range, before bad rounds stack up.
How accurate is it? Can it catch small deviations?
The system measures with micrometer-level accuracy and lets you set tight alarm windows. One customer running 9mm at 1,000 rounds per hour with alarms set at +.020" / −.015" reported the low alarms caught real undercharges of .05 grain or less — with zero false high alarms over the run. As with any powder check, consistent brass improves consistency: matching head-stamp brass lets you run the tightest windows.
Which presses does it fit?
RCM sensors are built first for Mark 7 presses running an Autodrive, with drop-in fit for Mark 7 station layouts (no machining required). Powder checks and dashboards are also available in Stand Alone Press versions for manual progressive presses, plus Specialty Output options. If you're not sure which variant fits your setup, call or email us before ordering — we answer within one business day.
Does it integrate with the Mark 7 Autodrive to stop the press automatically?
Yes. Choose the Mark 7 Output variant and the sensor connects directly to the Autodrive, stopping the press whenever a reading is beyond your set point or range. Stand-alone versions alert you with a display reading and optional buzzer instead.
Does it take up a die station like the Dillon, RCBS, and Hornady check dies do?
The laser head mounts to monitor the case at the powder station rather than occupying a separate die station the way mechanical check dies do — which matters on presses where stations are scarce. Station usage varies by press and model, so if your toolhead is fully loaded, contact us and we'll confirm the layout for your machine.
What's the difference between the Powder Check Standard and Pro?
The Standard version is the core digital laser powder check with Mark 7 Autodrive integration. The Pro adds the off-press laser centering fixture and includes centering dies in 9mm and .223/5.56, plus a head-down sensor with optional buzzer. The centering fixture makes setup faster and presents every case identically to the laser.
What does the V4 with the 7-inch screen add over the V3?
The V4 puts the full dashboard at the press: live charge readings, pass/fail indicators, charge history and trend graphs on a built-in 7" touchscreen — no phone or secondary device needed. It supports dual sensors, logs every round with timestamps, exports CSV, and offers optional Wi-Fi for remote monitoring alongside the display.
What do the centering dies do, and do I need one?
A powder check is only as consistent as the case underneath it. Centering dies present every case in exactly the same position on every cycle. For Mark 7 Powder Check probe users, our die also increases airflow around the probe — ending the powder spills and probe strikes on the case wall. For RCM laser checks, centering improves reading consistency, especially on narrow-mouth bottleneck cases. They're not required, but they're the cheapest accuracy upgrade you can make.
Which calibers do the centering dies cover?
Standard calibers include 380, 9mm, 40 S&W, 10mm, 45 ACP, .223/5.56, 300 BLK, 6.5 Creedmoor, and 308. Custom calibers are available on request with about 3–5 days production time. Die bundles are buy 3, get 1 free, and ship with 9mm and .223/5.56 included.
What does the Case Presence Pro catch?
Three of the most annoying progressive-press failures: mixed cases (a 380 case hiding in your 9mm brass), cases fallen over at station 1, and low cases that break depriming pins. It alerts when a case sits lower than the set height, with one-button setup and millimeter accuracy. We built it after breaking one too many depriming pins on our own presses. Mark 7 presses only.
What's the difference between the Port 1 and Port 6 versions of the Case Presence Pro?
It depends on whether you run swage sense on your Mark 7: choose Port 1 if you're not using swage sense, and Port 6 if you are. Same sensor either way — the option just matches the port your press has free.
What does the Bullet Check catch?
The Bullet Check Standard stops the press if a bullet is missing. The Bullet Check Pro also verifies seating height — catching seating-die walk before thousands of rounds need re-seating or re-crimping. Both integrate with Mark 7 presses running an Autodrive at station 9 or 10.
What does the dashboard log, and can I use it for commercial QC records?
The RCM dashboard logs round-by-round readings with timestamps and full session traceability, and exports CSV files that open directly in Excel or import into QC software. It supports up to two RCM sensors and serves live readings to any browser on your network. If you load commercially and need documented lot-level QC, that CSV trail is exactly the kind of record insurers and wholesale buyers ask about.
Will a powder check slow down my press?
The sensor reads every case as the press cycles — customers run it at four-digit hourly rates (the review on our reviews page was run at 1,000 rounds per hour). The only time it slows you down is when it stops the press on a bad charge — which is the point.
How do I calibrate it for a new load?
Setting changes are fast one-button operations — no die height adjustment and no probe swaps between cartridges. Set your target level, set your alarm window, and load. The Pro's off-press centering fixture makes initial alignment quicker as well.
How long does installation take?
The sensors are designed for quick installation: drop-in fit for Mark 7 station layouts with no machining, and the Case Presence Pro mounts via a bolt on the existing case ram. Setup walkthroughs are on our videos page, and if you get stuck you can call the people who built it.
What does shipping cost?
Flat-rate shipping of $9.99 per order within the US. You'll see the exact total in your cart before checkout.
What if I have a problem or a question after I buy?
You talk directly to the people who design and build these — no ticket queue. Call 307-423-9296 or email sales@rockcanyon.net and we answer within one business day. Support is US-based.