About to Give Up....
Quote from Reloader on August 27, 2021, 12:19 pm....and go back to loading single stage. The primer seating function has never worked on my 750, it seats them flush, will NOT countersink. Oh, and large pistol primers end up on the slide everytime. Shell plate is tight. I can live with hand priming but I can't live with the erratic bullet seating depth. 5.56 with a target of 2.260. It will literally seat one at 2.45 and the next at 2.70. Brass is once fired Lake City induction annealed, trimmed on the RT1500, tumbled and sized. Bullets are 69 gr SMK BTHP, dies are Redding Master Hunter but I get similar maybe slightly better results with cheapo Lee dies. Next step I'm going to borrow a mag base dial indicator to measure where the ram stops. I hope somebody here can help me or direct me to somewhere that can.
-Rick
....and go back to loading single stage. The primer seating function has never worked on my 750, it seats them flush, will NOT countersink. Oh, and large pistol primers end up on the slide everytime. Shell plate is tight. I can live with hand priming but I can't live with the erratic bullet seating depth. 5.56 with a target of 2.260. It will literally seat one at 2.45 and the next at 2.70. Brass is once fired Lake City induction annealed, trimmed on the RT1500, tumbled and sized. Bullets are 69 gr SMK BTHP, dies are Redding Master Hunter but I get similar maybe slightly better results with cheapo Lee dies. Next step I'm going to borrow a mag base dial indicator to measure where the ram stops. I hope somebody here can help me or direct me to somewhere that can.
-Rick
Quote from Reloader on September 3, 2021, 7:17 pmThe best your going to get on your primers is .0015" below flush and if you get sideways primers the shell plate my not be indexing all the way and when the primer punch comes up it is moving the shell plate the last little bit and flipping the primer. the other thing that will flip you primer is not having the press mounted solid. And installing a shell plate bearing and keeping the shell plate bolt tight will keep the plate from rocking and help with your OACL. I have both a early 1990"s 650 and 2 year old 750 they are very good machines.
The best your going to get on your primers is .0015" below flush and if you get sideways primers the shell plate my not be indexing all the way and when the primer punch comes up it is moving the shell plate the last little bit and flipping the primer. the other thing that will flip you primer is not having the press mounted solid. And installing a shell plate bearing and keeping the shell plate bolt tight will keep the plate from rocking and help with your OACL. I have both a early 1990"s 650 and 2 year old 750 they are very good machines.
Quote from Reloader on September 27, 2021, 4:03 pmI have the flat bearing and phenolic indexing ball on my machine. Dillon tech support says the priming system is only designed to seat flush. The answer was simple, primer pocket uniformer. It now seats .002-.003 every time.
I have the flat bearing and phenolic indexing ball on my machine. Dillon tech support says the priming system is only designed to seat flush. The answer was simple, primer pocket uniformer. It now seats .002-.003 every time.
Quote from Reloader on October 3, 2021, 5:57 pmAfter about 25,000 rounds I started getting a few high primers with my xl750 I knew it wasn't something I was doing so I gave Dillon a call. It turns out that my primer slide and punch were out of spec. My temp. fix while I was waiting on parts was to swap my small primer punch over to my large primer slide that combination is a bit taller and seats primers about .003" below flush. After my replacement parts came in I measured the depth of the hole in the primer slides where the primer punch sets and found the old primer slide was drilled to deep.
I've never had issues with my OAL I use a Redding micrometer seating die and have the seating die and the sizing die adjusted to just touch the shell plate and I keep the shell plate tight. I have attached a magnetic base dial indicator to a 5/16" steel plate for checking primer depth and OAL and check several cartridges each loading session it's very consistent.
After about 25,000 rounds I started getting a few high primers with my xl750 I knew it wasn't something I was doing so I gave Dillon a call. It turns out that my primer slide and punch were out of spec. My temp. fix while I was waiting on parts was to swap my small primer punch over to my large primer slide that combination is a bit taller and seats primers about .003" below flush. After my replacement parts came in I measured the depth of the hole in the primer slides where the primer punch sets and found the old primer slide was drilled to deep.
I've never had issues with my OAL I use a Redding micrometer seating die and have the seating die and the sizing die adjusted to just touch the shell plate and I keep the shell plate tight. I have attached a magnetic base dial indicator to a 5/16" steel plate for checking primer depth and OAL and check several cartridges each loading session it's very consistent.