I have a colleague from the club who is 100% virgin reloader with a 750XL dillon press.
Ive been doing my best as a 650 owner to get him up to speed. Got some nice carbide dies and had her purring a fewbhundred rounds but now old mate is getting fail-to-primes.
Naturally any one of us would observe this instantly, but old mate managed to press a hundred without primers 
. Yes, everyone should be forced to start on a single stage. But its my fault for telling him to straight into progressive.
So, you guys with 750 prime systems, they are totally different to 650s. Any ideas why its not feeding?
Tube is aligned
Primers slide freely
Indicator says yes
Tip of primer tube is brand new abd aligned.
I don’t have an answer for you, but…
100% yes.
But I am an all-mighty internet expert, some of you know who I am talking about, lol, so I have 2 things to suggest. First, did he feed it primers; and did he tried turning it on and off again?
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It seems the 750 is much easier to swap between small and large primers, doenst dump unused primers, at the expense of phantom mis primes.
The BrianPenis and Dillon forums are all still a bit rawn in their conclusions too.
The way I see it so far: alignment and tip condition and orientation being correct, adding weight to the feed rod to increase drop gravity really does help, but doesnt answer. I have a 45acp shell with a 230gn proj inserted as a weight. This treasts the symptom, but not the casuse.
Dillon 750 - seems like there’s a huge design oversight and the new priming system makes it impossible to host Mr Bullet Feeder and powder-check system together. Which really must be used together if you don’t like squibs.
Here’s a fun observation… @Supaduke has recently purchased one (somewhere in one of the threads) and I made him a bullet feeder. He couldn’t get his hands on DAA bullet dropper assembly (fortunate as we have discoevred), so I designed a custom bullet reservoir (to turn the motor off when the dropper die filled with bullets).
(inspiration came from a different design, I will post on full build later, when we get this thing going)
Bottom part sits on the die, top part retains bullet dropper spring (AliExpress deal, by the way, highly recommend, 1/2 the price and x4 the quantity). One side takes an LED and the other photoresistor with relay…
This is about half the height of DAA original dropper assembly (this is important), which I think is excellent, but a bit scarce these days. However, if you are running a 750 consider this a PSA - you will lose a station.
Note (above) when the handle is pulled down (ram up), the powder bar does not have enough room to move. This happens due to the new priming system which changes the angle of the powder bar by about 90 degrees. What a cluster fuck! This is the exact station where the dropper die should be. Unless both of us messed something up, this is a huge design flaw (backed up by few complaints on various forums). Or they just hate everyone. Of course, I presumed it’s going to be more or less the same as Dillon 650 (which it is, minus the priming system) and didn’t think twice about lack of clearance.
No stress, new design made to ride under the powder bar:
…but I am just gobsmacked someone could miss something this common and important.
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