If you prime by depth you should watch this test.

[Andy Work]

How many articles do we need on seating primers?

The same amount as we do on cleaning barrels

That will break the internet!

 

[Benchrest Braxton]

@orkan

 

[Dave Way]

I cut all my primer pockets to the same depth. I then use the same tool the clean out carbon and re-cut the pockets after each firing. Brass will be removed for at least 6 firings if not more. Yes, brass moves that much until it is work hardened. It doesn’t just flow forward and make donuts.

I seat by depth with the 21st century tool. This process is incredibly consistent. Have you ever measured primer height on 50 primers? Have you ever measured rim thickness on 50 cases? I have and both are extremely consistent, actually it’s difficult to find a difference. Buy quality brass, prep it and run quality primers.

Then seat by the depth that makes your loads shoot the smallest. There will be a difference at various depths(crush), namely if you don’t have enough crush. If you’re not constantly uniforming the primer pockets, you may want to start.

Dave.

 

[6Creed73]

I cut all my primer pockets to the same depth. I then use the same tool the clean out carbon and re-cut the pockets after each firing. Brass will be removed for at least 6 firings if not more. Yes, brass moves that much until it is work hardened. It doesn’t just flow forward and make donuts.

I seat by depth with the 21st century tool. This process is incredibly consistent. Have you ever measured primer height on 50 primers? Have you ever measured rim thickness on 50 cases? I have and both are extremely consistent, actually it’s difficult to find a difference. Buy quality brass, prep it and run quality primers.

Then seat by the depth that makes your loads shoot the smallest. There will be a difference at various depths(crush), namely if you don’t have enough crush. If you’re not constantly uniforming the primer pockets, you may want to start.

Dave.

Interesting. I uniform the primer pockets once and never check them again...never really thought about the pocket changing after firing. Now you've got me thinking and I'm going to recheck the pockets.

 

[JPB4BAMA]

Yes, I made the modification to get the seating depth I wanted. Out of the box it was seating at 0.0035, also very consistently.

The ACP isn't perfect, it has a lot of plastic that I'd prefer to be aluminum or something, but it works. If mine broke tomorrow, I'd have another one ordered the same day. I have no desire to use anything else.

Unfortunately not. It has been discontinued. Looks like a modifies app press is the replacement and uses some kind of shell holder and not the same as the actual.

Love mine but primer feeding has always been iffy so I basically “double clutch” it and hand feed one at a time fully ejecting the primed case before loading another one When the pen primer feeder crapped out I just hand fed primers and still proffered that to any of my other tools.

 

[D Coots]

Nope, but from what I have seen it should be easy to drill and tap the handle of the newest model to give the same adjustable stop that mine has.

Beware of when the moving parts wear that cute little stop will lie and the primer may protrude past the face of the case after lots of use.

I know a guy that has the tool without the stop and as the mechanism wore the primer did not fully seat when seating by feel. Caused irregular bullet seating depths and a lot of grief.

Bart saw the results at the Nationals this year as he was 2 benches away from me. It wasn't the scope Bart....

And what did you mean Bart when you said you can't make a PPC shoot that bad??? Remember, my Grandpa came to Iowa from Missouri......Show Me

 

[JFrank]

For the guys standing on the edge of the hole wondering how far to the bottom, you can rest a little easier knowing that once a primer is fully seated that a few clicks or a little extra force doesn't change the paper ( until it does ). Adjustable seaters make it simple to add a few thousandth's crush or add a bit more while testing.
I test a lot of dumb stuff and sometimes I test good stuff, this test was at 500 yards and the tune didn’t really seem to change except the tailwind messed with one charge.

 

[Larry Koch]

Why is the Lee ACP discontinued?

 

[rsbhunter]

I believe that it was because it was a 1 trick pony..it was portrayed as a priming tool only. You could convert part of it and also deprime, but was it worth the trouble? I find it easy to use as a priming tool only, less case handling with the case feeder accessory...rsbhunter

 

[BoydAllen]

Beware of when the moving parts wear that cute little stop will lie and the primer may protrude past the face of the case after lots of use.

I know a guy that has the tool without the stop and as the mechanism wore the primer did not fully seat when seating by feel. Caused irregular bullet seating depths and a lot of grief.

Bart saw the results at the Nationals this year as he was 2 benches away from me. It wasn't the scope Bart....

And what did you mean Bart when you said you can't make a PPC shoot that bad??? Remember, my Grandpa came to Iowa from Missouri......Show Me

When I seat by feel I set up the tool so that when the primer is seated the handle is no where near the body of the tool. There seems to be an optimal seated primer handle position that gives the best combination of sensitivity, leverage, and comfort that I adjust for, but even if a tool is not adjustable, as long as the handle does not come close to touching the body of the tool I have never had a primer that was even close to being flush or above flush. On the wear, with my old Sinclair (black with stop backed off not to engage) I have on occasion taken it apart and readjusted the linkage to maintain the handle position that I prefer. I looked at the parts of the new one and I believe that it can be adjusted in a similar fashion.

 

[WSnyder]

I looked at the parts of the new one and I believe that it can be adjusted in a similar fashion.

Yes you can definitely adjust the plunger to set where you want the handle on the 2nd gen.

 

[D Coots]

When I seat by feel I set up the tool so that when the primer is seated the handle is no where near the body of the tool. There seems to be an optimal seated primer handle position that gives the best combination of sensitivity, leverage, and comfort that I adjust for, but even if a tool is not adjustable, as long as the handle does not come close to touching the body of the tool I have never had a primer that was even close to being flush or above flush. On the wear, with my old Sinclair (black with stop backed off not to engage) I have on occasion taken it apart and readjusted the linkage to maintain the handle position that I prefer. I looked at the parts of the new one and I believe that it can be adjusted in a similar fashion.

The handle on my Sinclair was not bottoming out, the mechanism was.

 

[GetReal]

How many articles do we need on seating primers?

I was looking for the effect seating depth has at 100 / 1000 yards....

 

[BoydAllen]

The handle on my Sinclair was not bottoming out, the mechanism was.

Were you tightening the head of the tool on the case head for each case? As far as I know loosening and tightening the head for each case is unique to the Sinclair tools. That is the feature that divorces seating depth from variations in rim thickness, for those who seat using the stop and try to duplicate the same depth that way.

 

[D Coots]

Nope, not tightening head. Not concerned with seating depth in SR, only crush 4 me.

Merry Christmas

 

[drop_point]

Rather than modifying the Sinclair with a set-screw as a stop, why couldn’t you just shim the mechanism the seating rod rides through up or down, replacing the little washers that already exist?