Fouling is a function of rounds fired, not days on the calendar. Here are the common-practice intervals by firearm type - and the one rule that overrides all of them: your manufacturer’s manual wins.
The short answer
Clean by rounds fired, not the calendar. Common practice is a field-clean every 300 - 500 rounds for a carry pistol, 500 - 1,000 for a range pistol, 250 - 500 for an AR (kept well lubed), and by observed accuracy for precision rifles. Steel-cased ammo, corrosive surplus, and suppressor use shorten those intervals. Your owner’s manual is always the authority.
Carbon, copper, plastic wad residue, and breaking-down lubricant all accumulate per shot. A pistol that sat in the safe for six months needs a light inspection; the same pistol after 800 rounds of steel-cased ammo needs a cleaning, whether that took six months or one weekend. “Clean it every month” schedules over-clean safe queens and under-clean range regulars.
The exception is guns that live hard lives without firing - a daily-carry pistol collects lint and sweat at zero rounds. So the working rule is: clean by round count, inspect by calendar.
It depends on the platform. As a rule of thumb: carry pistols every 300 - 500 rounds, range pistols every 500 - 1,000, AR-pattern rifles every 250 - 500 (lubed throughout), bolt/precision rifles every 100 - 300 or when accuracy drops, rimfire every 300 - 500, and shotguns every 200 - 400 shells. The full table, with notes, is below.
| Firearm | Common practice | Notes |
|---|---|---|
| Carry pistol | Field-clean every 300 - 500 rounds | A defensive gun has to run. Many owners wipe and re-lube after every range session, and inspect monthly regardless of round count - holster lint and dust accumulate even when it isn’t fired. |
| Range / competition pistol | Every 500 - 1,000 rounds | Modern semi-autos run dirty longer than most people expect. Watch for sluggish slide return or failures to feed - that’s the gun telling you before the count does. |
| AR-pattern rifle | Field-clean every 250 - 500 rounds; keep it lubed throughout | Direct-impingement ARs vent gas into the action, so they foul fast but tolerate it well when wet. Common practice is “lube often, deep-clean occasionally” - the bolt carrier group is the priority. |
| Bolt-action / precision rifle | Bore every 100 - 300 rounds, or when accuracy drops | Precision shooters clean by observed accuracy, not habit - copper fouling builds slowly, and many barrels shoot best slightly fouled. Aggressive rod work at the crown does more harm than carbon. |
| Rimfire (.22 LR) | Action every 300 - 500 rounds; bore sparingly | Wax-lubricated bullets and dirty powder gum up rimfire actions faster than centerfire. Semi-auto rimfires are the most fouling-sensitive guns most people own. |
| Shotgun | After each outing, or every 200 - 400 shells | Plastic wad residue builds in the bore and gas systems foul quickly on semi-autos. Break-actions and pumps tolerate more neglect than gas guns. |
These are common-practice ranges reported by shooters - not manufacturer guidance. If your owner’s manual specifies a cleaning or lubrication interval, the manual overrides everything in this table.
Five things cut the interval, sometimes in half: steel-cased and budget ammo, corrosive surplus ammo (clean same-day, every time), suppressor use, harsh environments (dust, rain, salt), and daily carry or storage conditions. When any of these apply, let function and inspection lead, not the round count alone.
Dirtier powder and non-reloadable cases with harder coatings leave more residue per round. If you feed your gun the cheap stuff, cut the common-practice interval roughly in half and let function be your guide.
Old military surplus with corrosive primers deposits salts that attract moisture and pit steel. This is the one case where cleaning is urgent: flush with water-based solvent the same day, every time, no exceptions.
A suppressor pushes gas and carbon back into the action - suppressed guns foul several times faster than the same gun unsuppressed. Rimfire suppressors also lead up fast and have their own cleaning schedule; follow the suppressor manufacturer’s manual too.
Dust, rain, mud, and salt air all shorten the clock independently of round count. A gun that spent a day in the desert or on a duck marsh needs attention that night, even if it fired ten rounds.
A pistol carried daily collects lint, sweat, and holster wear with zero rounds fired. Round count is the best single trigger for cleaning, but carry guns also need a calendar-based inspection - common practice is monthly.
Every interval above assumes you know how many rounds you’ve fired since the last cleaning - and almost nobody does from memory. The fix is a range log: record each session’s firearm and round count, and the running total does the deciding for you. If you’re starting from scratch, our guide on how to track rounds fired covers the whole system, including estimating a baseline for guns you’ve owned for years.
Shots Fired automates it: log a session in seconds, set a cleaning interval per firearm - every 500 rounds, or whatever your manual says - and get a reminder when you cross it, with a service history of what was done and when. And because a range log is a list of your guns, everything stays on your phone: no account, no cloud, no server. That architecture is spelled out in our Privacy Manifesto.
Common practice for modern semi-auto pistols is a field-clean every 300 - 500 rounds for a carry gun and every 500 - 1,000 for a range gun, plus a wipe-down and re-lube any time it gets wet or dusty. Your owner’s manual is the authority - if it specifies an interval, follow that instead.
It depends on the platform. AR-pattern rifles are commonly field-cleaned every 250 - 500 rounds and kept well lubricated between cleanings. Precision bolt guns are usually cleaned by observed accuracy - often every 100 - 300 rounds - because many barrels shoot best slightly fouled. Defer to the manufacturer’s manual for your specific rifle.
Sort of. Normal field cleaning won’t hurt anything, but aggressive cleaning-rod work can wear the muzzle crown and throat - the two areas that matter most for accuracy. Use a bore guide, work from the chamber end when possible, and don’t scrub a barrel that’s still shooting well.
Common practice is to field-strip a new gun, wipe off the heavy factory preservative grease, and lubricate it per the manual before the first range trip. Check the manual’s break-in section - some barrel makers specify a cleaning routine for the first several rounds, and theirs is the procedure to follow.
Yes, significantly. Steel-cased and budget ammo runs dirtier; corrosive-primed surplus requires same-day cleaning every time; wax-lubed .22 LR fouls actions quickly; and shooting suppressed multiplies fouling on any platform. Track what you shoot alongside how much - the ammo column in your range log earns its keep here.
You log it. Record every session - firearm, date, rounds - and reset a counter when you clean. A round-count app does this automatically: log sessions, set a cleaning interval per firearm, and get a reminder when you cross it. That’s exactly what Shots Fired does, with everything stored on your phone.
Free to start - rounds-based cleaning reminders included. No account. No cloud.
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