06/10/2022
- Cleaning Large Bore Rifles
Thereโs a growing misconception surrounding proper cleaning of big bore rifles. Perhaps the aid of proper tools eludes shooters, or even that false positives are being gleaned from chemicals and techniques fooling the shooter into believing that their barrel is clean when it is not.
Big bore rifles often need more frequent attention to maintenance than their small counterparts. Barrels commonly foul sooner than small calibers with similar round counts. Why? Burning 3-4x the amount of powder, at much slower rates, with a larger contact surface area of projectiles, the amount of fouling left behind is tremendous. Itโs like a Top fuel dragster v. the daily driver. One requires the engine be disassembled and cleaned each pass down the track, or it loses peak performance, if not catastrophic failure. The other, a mere oil and filter change every 3-5K miles. Both vastly different maintenance requirements.
We rarely advocate shooters use bore scopes, especially if theyโre unfamiliar with them. Many who start using them, become a bit OCD in cleaning. That said, when one becomes accustomed to looking through one and equating amounts of visible fouling to whatโs going on with their chronograph and groups down range, it becomes a superb tool for shooters to utilize. It will show the user every single detail inside the barrel; perhaps a bit too much with respect to magnification. No rifle bore is perfect from one end to the other in terms of metallurgy and finish. Once you learn to look past that, using it for cleaning purposes, the toolโs invaluable to achieving consistency down range.
Listen to your rifle. It tells you everything it needs. You're already doing this during load development. By experimenting scientifically to find what bullet, charge weight, and seating depth yields the best performance, youโre listening to what the rifleโs telling you works. Same goes for cleaning. Itโll tell you what it needs regarding thoroughness of cleaning and the depth of regimen needed to keep it performing at peak levels. Some need more than others, while others can go a little longer on the round count before pressures start to climb.