LEE Breech Lock Update Kit & Spline Bushings for RCBS Summit 

I tried using the Hornady and LEE systems on my LEE Classic Cast, and after a while I got rid of both. They work as you describe, but. These will not withstand heavy use. The Hornady (all steel) bushings all developed chips on the die bushing lugs and would no longer maintain vertical position. Then I tried the LEE system. The press bushing was aluminum and after some use the interior threads would wear to the point where just using the supplied plastic wrench to take out any vertical movement, the die bushing could turn through the press bushing and be useless. LEE used to make SS die bushings with a built clamp and they did not suffer this problem of turn through, but accelerated the wear on the press bushing so that the aluminum die bushings would no longer stay put. If LEE would make an optional steel press bushing and still offer the SS die bushings I would most likely still be using the LEE system. Sold all the Hornady stuff on Reddit and recovered enough money to buy a Forster Coax and never looked back. I must say every time I had a Hornady die bushing crack they replaced it, but they never got the heat treating correct. So for light to moderate use these two systems are OK, but for any heavy use you are better off with the 7/8x14 thread original press bushing. Your experience may differ.

I got the Lee Bushings x4 for exactly this reason. Fast interchangeability to FLS cases and seat projectiles for my 223 & 6.5 without faffing about. Great video John!

Hornady Lock-N-Load quick die change bushings are far easier to swap in and out, and are not made of cheap aluminum which will wear out easier. And the only time I had a die come lose was because I for got to tighten the die lock ring. Other than that one slip-up they have never come loose. The Hornady system will rust and Lee's will not is the only advantage the Lee ones have over the Hornady ones. Yet again the Lee ones will wear out faster being they are made of softer material. To each there own.

John try sizing 20 pieces of brass and see how consistent your shoulder bump is

Great review John,I was hoping Lee would have that conversion kit.I have a bunch of the spline drive breech lock bushings since getting the APP deluxe press and am going to get my RCBS setup for that system.I hope you had a Merry Christmas and have a Happy New Year.

Having used both Lee and Hornady ones now which one is better do you think?

I have a one and a quarter inch threaded die insert. I would like to make that a 7/8 inch die insert. Is there anyway to take a male one and 1/4 inch thread and make it a 7/8 female so that I can use 7/8 inch dies on my one and a quarter inch press.

Where do you get the Lee insert that accepts the Lee bushings?

Excellent demonstration. 1 question: how easy is it to switch out the conversion insert piece and return the press to its original state? (so that I don't have to buy bushings for my lesser used dies)?

what is the name of the priming system? I want to look into that

My problem with the summit look at the 4min mark in the video do you see how much movement the ram has grab the ram from the top and rock it back and forth the amount of play can't be wright.

After using an RCBS Rockchucker for years all this insert and die bushing stuff seems ridiculous and unneeded. It takes about 3 seconds to change the old screw in dies. Needless complication with a million extra steps makes no sense to me.