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Lee Loadmaster Prime on Bottom primer conversion kit

ADePdesigns  
Arrives soon! Get it by May 4-8 if you order today
May 4-8

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Star Seller. This seller consistently earned 5-star reviews, shipped on time, and replied quickly to any messages they received.

Highlights

  • Made by ADePdesigns
  • Materials: 3d printed

Lee Loadmaster Prime on Bottom conversion kit.

Lee Loadmaster Prime on Bottom System © 2023 by Andy DePriest is licensed under CC BY-NC-ND 4.0

Now shipping V25 design with following updates:
3 piece housing for improved dimensional control
Multiple indexer profiles
locking carrier mount to better support primer assembly

**** new images will be uploaded soon to show latest design *****

All orders come with 1 year of warranty. I will fully support any issues that arise from manufacturing defects or function.

see it in action
www.youtube.com/@AndyDep

Large or Small Primer assemblies available in the options list

Moves the priming operation to bottom of stroke on station 2. Isolates the priming operation from all other operations so you can "feel" the primer seat.

NOTE: There is no physical adjustment for primer seating depth. Seating is done by "feel" This is an odd concept for Loadmaster owners, but this is same priming method currently used on Dillon 550 press.

Allows powder drop to move from station 3 to station 2 creating option for an additional operation on the press such as powder check and factory crimp (instead of one or the other)

Easy installation, does not require any permanent modifications to the press. simple remove the old parts and install the new parts.

Kit includes: New priming pin, new tube feed primer system, and indexer timing components.

The primer system is tube feed and will feed all primers loaded and does not leave 5 or 8 behind like the original Lee feeder.

***DOES NOT WORK WITH SPRING LOADED INDEXER SMOOTHER DEVICES THAT MOUNT BETWEEN CARRIER AND LEVER ARM***

***IF YOU NEED A SPRING LOADED INDEXER SMOOTHER PLEASE CHECK MY OTHER LISTINGS FOR ONE THAT WORKS WITH THE PRIME ON BOTTOM SYSTEM***

***THE POB SYSTEM IS A COMPLETE OVERHAUL TO HOW THE LOADMASTER WORKS. IT DOES NOT SOLVE THE EXISTING ISSUES WITH THE INDEXING. IT MAY MAKE THE INDEXING EVEN MORE SENSITIVE TO PROPER SETUP. IF YOU EXPECT IT TO WORK PERFECTLY OUT OF THE BOX AND ARE NOT WILLING TO ADJUST THINGS AS NEEDED THEN THIS MAY NOT BE THE BEST PRIMER SYSTEM FOR YOU. THE TUBE FEED SYSTEM I SELL IS A SIMPLER CONVERSION THAT ONLY CHANGES THE PRIMER DELIVERY AND NOT THE INDEXER TIMING. ***

Disclaimer:
3d printers do not create 100% exact copies each time, and reloading presses will have varying production tolerances. Lee has made subtle changes to the Loadmaster over the 30 years of production. A perfect fit cannot be guaranteed, and some fitting of the parts might be needed to make parts work as expected.
Reloading can be dangerous. All reloading is done at your own risk. The author assumes no liability for related damage, injuries or death that could result from the use of this or any reloading equipment.

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  • Order today to get by May 4-8
  • Returns & exchanges not accepted
  • Cost to ship: $10.00
  • Ships from: Melbourne, FL

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Reviews for this item

Buyer highlights, summarized by AI: Great product · Helpful seller · Excellent customer service · Happy customer · Fast shipping · Works great · Clear instructions

4.9

We calculate this number using a recency-weighted average of all ratings, with a rating's value decreasing by half each year to best reflect the current experience.

(21 reviews)

5.0 Item quality
5.0 Shipping
5.0 Customer service
100% Buyers recommend
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5 out of 5 stars 5 This item

John Mar 10, 2026

As always, very happy to receive such a great item.

John Mar 10, 2026

4 out of 5 stars 4 This item

Buck Feb 18, 2026

This bottom prime system is absolutely over the top. I now have it on both of my Lee Load Master press. The only issue I have had is operator error by runing out of primers in 3000 9mm rounds! Great Job!!

Buck Feb 18, 2026

5 out of 5 stars 5 This item

John Feb 3, 2026

This kit is AMAZING. Just what the Loadmaster needed! Now I can crimp on the final station. Well packaged and quickly shipped. The parts are incredibly well designed and the print quality is top notch. The instructions are very well detailed. I had this assembled in no time. I will be back for the large primer parts as well. Thank you, Andy!

John Feb 3, 2026

5 out of 5 stars 5 This item

Rocky Feb 2, 2026

It work like advertised very happy with it

Rocky Feb 2, 2026

ADePdesigns
ADePdesigns ·

Florida, United States

We calculate this number using a recency-weighted average of all ratings, with a rating's value decreasing by half each year to best reflect the current experience. 4.9
·
687 sales
·
2 years on Etsy

Typically responds within a few hours

Typically responds within a few hours

Smooth shipping Has a history of shipping on time with tracking.

Speedy replies Has a history of replying to messages quickly.

Rave reviews Average review rating is 4.8 or higher.

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Listed on Apr 24, 2026