The only lubes I use are the Benelli oil that came with gun, Breakfree CLP, and Breakfree LP. I use the CLP in the recoil tube, and the LP on the bolt rails and other places that require a light coat of lube according to user guide. I used the Benelli oil prior to buying Breakfree but the problem occured using both lubes. To my knowledge Breakfree is a good product and it is synthetic. Here's info on the product, "Break-Free's flagship product, CLP is a unique formulation of synthetic oils and individual proprietary ingredients which synergize in combination to do three important tasks simultaneously: Effectively Clean, Lubricate and Protect metal. After years of rigorous testing, CLP actually exceeded the Military's requirements and was approved as a product to meet MIL-L-63460, a new specification. Break-Free CLP is now recognized around the world as the standard by which maximum metal performance and protection is ensured."
It has stovpiped Kent, Winchester, and Fiocchi brand. It shouldn't matter what brand shell you use a 1500 gun should shoot all of them. My $500 Mossberg shoots these brands with no problems, but I want to use an inertia gun because they are easier to clean. I shouldn't have to buy a specific brand to ensure my gun functions properly. If that's the case I may have to drop Benelli and get a different gun.