Lyman case trimmer pilots

[Walks]

Such a simple thing and so much confusion.
I have RCBS and Lyman trimmers. Have always expanded cases, either straight wall or bottleneck. It's the way Dad taught Us back in the 50's-60's.

[lesharris]

I too have had the same problem with Lyman trimmer pilots. I ordered new pilots and fit and worked without any problems. Could be lyman fixed the issue. I always trimmed after sizing.

[doulos]

These pilots are very old. I had no such issues trimming with a RCBS trimmer and pilots after sizing. I just sized cases first because thats what Lyman said. Rcbs suggests it also. Neither said anything about case mouth expanding. Manufacturers instruction is what I have went on. I never had a mentor for this hobby. So I just read what I could. But everyone here has given me some sound advice. Thanks

[gwpercle]

I have a almost unused Lyman case trimmer. Was playing around with it and some of the pilots are so large they wont fit a sized case mouth. Never had this issue with RCBS pilots. Anyone else had this issue with Lyman trimmer pilots?

Since day one ... all the instructions say to SIZE the case then trim ...but that doesn't work because the pilots are too large and the sized case neck will not fit over and onto the pilots ...... So ... about 40 years ago , when I got the trimmer , I went to trimming fired cases ...then sizing them ... worked like a black magic Voo Doo charm and been doing it that way ever since .
Gary

[Three44s]

Processing .223/5.56

For me it’s cases trimmed on a Lyman with unsized necks. Trim to a length close to the trim to length. Use the carbide cutter and it’s fast. Bevel and chamfer the case mouths.

Next, I full length brass new to me.

The final run is on two Wilson trimmers, one to set the final length the other to final cut the bevel on the primer pocket after its run on the RCBS pocket swagger.

The Wilson gives me the squarest case mouth of any trimmer I have tried.

I am a stickler for inside flash hole deburring. With a good consistent case length and a square mouth I get a good consistent flash hole debur depth.

For my bolt guns, I figure I will not have to trim again for quite a while since I use a Lee collet die, the AR’s are a different story.

Three44s

[gwpercle]

Processing .223/5.56

For me it’s cases trimmed on a Lyman with unsized necks. Trim to a length close to the trim to length. Use the carbide cutter and it’s fast. Bevel and chamfer the case mouths.

Next, I full length brass new to me.

The final run is on two Wilson trimmers, one to set the final length the other to final cut the bevel on the primer pocket after its run on the RCBS pocket swagger.

The Wilson gives me the squarest case mouth of any trimmer I have tried.

I am a stickler for inside flash hole deburring. With a good consistent case length and a square mouth I get a good consistent flash hole debur depth.

For my bolt guns, I figure I will not have to trim again for quite a while since I use a Lee collet die, the AR’s are a different story.

Three44s

LIKE !
Gary