RCBS Chargemaster Reducing Insert Reducing insert with small removable sleeve. Works to reduce powder overthrows when using extruded powders like Varget and makes for uniform charge weights. It is very accurate and might all but eliminate overthrows entirely. $17.95 shipped. PM for details. *Measure your discharge tube]- If you have an older Chargemaster, it may have a smaller tube inside diameter in the .265 range. Make a note of this so I can spin one down to fit. 99% are in the .310+ range but its best to measure to be sure. The best way to measure is lock your calipers at .310 and see if they fit. If not, lock them at .308 and check, and so on. Find the smallest number that will fit and give me that. Another way to check is see if a .308 cal bullet will fit in the tube. All inserts are a few thousands undersized for a universal fit and you will add just a small piece of scotch tape or plumbers tape to the OD of the insert for a slip/snug fit in your discharge tube. This insert also works in other electronic dispensers such as the Lyman and Hornady units. Accuracy Tech article - http://www.accuracy-tech.com/chargemaster-reducing-inserts/ I still make the original without the extra sleeve, but they are not nearly as popular. $12.95 Shipped "Poor man's prometheus. I picked up two of the new sleeve reducers from MDM and all I can say is wow. My current setup is 2 chargemasters and a fx120i with omega trickler. My first ten charges with new sleeves all within 0.02 of target charge. After 100 charges and checking against fx120i, I've only had to use trickler a couple times. I've yet to have one go over."