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New SL 900 Arrived
Kicks primer out on the floor 5 or 10 in 80 round run.
What to do?
Other wise very fast.
My super 1050 Is primer  problem prone.
If any stop age in both machine are all way primer related.
I have a square D a 550, 1050 And the new SL900 also a RF 100
The only one totaly reliable is the 550 you can see the primer before it
is set.
The RF 100 primer filler is only usable on the 550.
2 or 3 primer will be upside down in a 100.

Did you have any shells fail to get a primer seated into them?

yes The one that fall out.
I did't notice what was going on until un primed shell came threw.
Started watching and every one in a while primer will fall out instead
of going into primer position. Going slow and not trying to set speed record.
They fall out toward the front
Have trouble with 1050 also Just run a hundred Five un primed.
They show up at back of the machine.

When you say "fall out" do you mean that the primer is falling out of the hull (eg it's seated but then falls out)? If that's the case you're probably using hulls that were previously loaded with European primers (Nobel sport , fiocchi, cheddite) but are now trying to load them with American primers ( federal, CCI, win) which are slightly smaller in diameter.

If your referring to primers getting kicked out of the transfer arm before they even make it to the hull, that's probably due to too much gap between the drop tube and the arm. The techs at Dillon say it should be no more than .040".

You may also,want to watch these two videos as they addressed a similar issue.

http://youtu.be/KPMLQUqVk5o

All  double AA hulls  They fall on the floor never gets to the hull.
Instead of going into the re loader it flip's them out of the machine.
Like the spring that activates the primer arm is to strong.
going slow does not help once the spring is activated there is no
 control.

Ok...two recommendations.

First, watch the 2nd video mentioned above.
Second, look for a burr possibly in the primer transfer arm that is preventing the primer from dropping into the "cup" of the arm. I discovered this recently when switching to Federal primers (I use them during the winter because they are a little hotter) and the Federal primers have a slightly larger base diameter (.006") compared to Winchester primers.

Measure your gap between the bottom of the drop tube and the top of the transfer arm. If its more than .040" it could be that your primers are tilted in the transfer arm and are getting flicked out. As painful as it sounds, try cycling through 100 primers (without loading hulls) and just watch to see if you maybe experiencing this problem. The primer is dropped from the tray on the down stroke...pause and look from the side (flashlight might help too) to see if the primer is sideways.

Sorry for the link posting error. The first link to the SL900 video went to a Carhart commercial. This is the correct link:

Took the top off of the primer tray.Watched bar insert primer some were cocked.
Adjusted 17639 untill dead center over  drop tube tube.
Run 20 threw to see if any hang of them hung up
This adjustment is very critical a 1/8 0f a turn make a big differance.
Loaded a few seem to work but run out of empty hull's
Hope this solve the problem
I don't think the gap is a critical as making sure the primer bar in
dead center over drop hole.
off a fraction and primer hang up.
I use all Winchester  AA once fired and Winchester 209 primers.
So hull and primer are not an issue.
It a mater of timing

Yes, the adjustment of 17639 is critical. You need to make sure it's traveling far enough to reliably drop primers. When adjusting, I'll typically drop about 30 primers in the tray and cycle them out while making small tweaks to the screw until I get 100% drop. I've found that the gap is important when it gets too large as it gives the chance for the primer to drop sideways into the arm if the gap is too large.

When reloading, I 'watch' the primer from the tray to the hull. I watch the arm move the primer into the drop tube and then I shift my eyes down and watch the transfer arm move it over to the hull. You are right, it is very timing defendant but after a bit you'll get the timing down and only have to watch the primer from the tray to the hull and if anything goes wrong, you can catch it before you end up,with a hull with no primer. I've got mine dialed in now such that I rarely have a problem with primers.

Make a collar around 1379 ( i made mine fron piese of tubing outside 12mm inside 10mm).
Now you have moore movement and you can adjust better

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