Pistol Bullet Feeder Dies

thingiverse

Having used the dies posted by [DPGunworks](https://www.thingiverse.com/dpgunworks/designs), I thought I could design a set of pistol bullet feeding dies that fixed some of the issues I came across while using their design. So, I set about redesigning the ball bearing detent, die assembly, and bullet tube interface. The result are the following 3 dies. <ul> <li>9mm/357 Cal. pistol die</li> <li>40 Cal./10mm pistol die</i> <li>45 Cal./11mm pistol die</li> </ul> Each die uses three 3.5mm [ball bearing](https://www.amazon.com/Breezliy-Precision-Stainless-Assorted-Assortment/dp/B08KTBM74G/ref=sr_1_4) detents and two 15.8mmx20.6mmx2.4mm [o-rings](https://www.amazon.com/HFS-Universal-Assortment-Metric-Automotive/dp/B06XCQQPXS/ref=asc_df_B06XCQQPXS). My design has 3 channels in the outer die body for each of the ball bearings to ride in. At the bottom of each channel, it turns inward causing the ball bearing to protrude out of the corresponding detent hole of the inner die body. This keeps the bullet from falling all the way thru until the inner die body is pushed up allow the ball bearings to retract into the channels. The inner die body also rests on the top of the outer die body. This prevents the detent holes from deforming due to unnecessary pressure from the ball bearings as the o-rings pull the inner die body down towards the outer die body. Additionally, the o-rings do not see any stretch when the dies are at rest. They are stretched only when a shell is forced up into the die. The top of the inner die body for 9mm/357 Cal. is sized for the smaller, 57/128", bullet tube. The top of the inner die body for the 40 Cal./10mm and 45 Cal./11mm is sized for the larger, 9/16", bullet tube. They should friction fit into the top. I did not include a locking nut in my design. I used the [Reloading Die Locking Ring](https://www.thingiverse.com/thing:3419273) by [Olin Coles](https://www.thingiverse.com/olincoles/designs). NOTE: I've only testing the 9mm die with 115gr, 125gr, and 147gr polymer RN projectiles, the 40 Cal. die with 180gr RNFP plated projectile, and the 45 Cal. die with 230gr polymer RN projectiles. If you use the die on caliber or weight not listed above, I would greatly appreciate a note in the comment section as to whether or not it worked or not.