A BP Original. Crimp depths often vary from load to load, even to a point where it is difficult to produce a proper fold crimp. This makes roll crimps ideal for shell lengths of almost any size. A compromised crimp can severely disrupt the entire combustion process, thus diminishing performance or even causing a blooper.
Performance: Shotshell load performance can vary shell to shell because components such as slugs, buckshot, and full-length field wads, by their nature, are not flexible platforms. Roll crimps adjust to the load (instead of the load adjusting to the crimp) and the ballistic results demonstrate more consistent & sustained combustion. Ultimately, a more consistent propellant burn yields more consistent performance.
Note: Beware of cheap knock-off roll crimpers that will produce insufficient crimp quality, erratic loads, and bloopers. We've been machining our specialty roll crimpers for over 35 years. Many specialy ammunition manufacturers rely on BP quality roll crimpers for their high-performance loads. So don't waste your hard-earned money on a cheap copy. Go with BPI's original Roll Crimper and save yourself frustration and wasted loads.
BPI Hull Vise and Roll Crimpers; a perfect match. Click on any of the links below to go to that product page.
Roll crimpers can be used with a hand drill or a drill press.
The Easy Art of Roll Crimping:
Start with any uncrimped paper or plastic hull. New, uncrimped hulls are available in almost every type and length. Once-fired hulls can be cut down 1/4" and then roll crimped. For example, a 3" hull can be cut down to 2-3/4" in length and then roll crimped. Our Trim Doctor tool was designed for this procedure.
Prior to crimping, load the shell as you would any other shotshell load. We recommend using a Wooden Reloading Block during this process to keep loads organized and avoid spillage.
After dropping the shot and before crimping, place either an Overshot Card or Clear Overshot Disk on top of the pellets.
Secure the hull. Though it does not take much force to hold the shell, this procedure is made easy with the use of a Hull Vise.
Place the roll crimper on top of the hull. Our roll crimpers are designed to best work in a clockwise rotation. Start spinning the drill and apply very light pressure. When the edge becomes pliable through a combination of heat and pressure, roll the lip down until it makes contact with the overshot card wad. Curing: Your roll crimper will begin to cure as you use it more and more. Roll crimping will become faster and easier as your tool gains experience.
I am used to fold crimps but I dont always like the end result. I tried these roll crimps and with a little practice I am starting to produce very pleasing finished shells in 10 and 12 gauge. I use a drill press at the slowest speed possible, 240 RPM, and have gotten the feel for the correct time and pressure. You need to be careful though not to keep it on too long as it will melt the hull. Only issue that I have is the lack of nice clear plastic or printed Overshot cards for anything other than 12 gauge. Come on BPI make more gauges!
- Joseph Leighty, PA
BP Roll Crimper
I purchased this roll crimper for some of my hunting loads that are very hard to get a good fold crimp. I suggest reading the info on using a roll crimper and practice on some junk hulls first. Took me a few times to get the hang of it before I tried it on new hulls. Im very impressed with the results of what this crimper can do! no more fold crimps for my buckshot loads either!
- Bryce, UT
The Roll Crimper Saved the Day!
With an inexpensive OS card, this tool makes perfect shells. I was sooooo frustrated trying to get good, consistent fold crimps. It was not happening. The shells looked poor, I wasted components read: money$$$, and did not enjoy what I was doing. The Roll Crimper changed that. Sure, it takes a little longer to do a box but so what? I put the tool on my drill press, warm it up a little with a heat gun, and Im in business. Does great with slugs too. I am totally sold on this wonder.
I cant belive my eyes
Im not easily impressed but wow Thank you ballistic products! Woth every penny$! I had a factory crimp after my first try and love this roll crimper! Ill definitely buy another. 100% amazing
- Mike Larremore, AZ
easy to use if you use a small drill press, works great
- Cheyenne, CA
Ive only used this on new hulls but it works great when I roll crimp my slug reloads. Mix this with the hull vise and a drill, it makes reloading slugs quick and easy. If I knew it was this easy I would have made my own slugs years ago
- J Mireles, KY
OK even crimped shells sometimes dont stay crimped - know what I mean? by lightly running this over crimped shells they are 100% crimped and sealed and stay that way. Use a drill press and light pressure.