thanks to all for the tips re identifying the recently discovered lifter. I have the family bringing it to my shop tomorrow to begin the ID process.
this will be my first time to actually research the details of a Parker this old and I'm sure I'll need plenty of guidance.... but I know I'm in the right place.
I will post measurements, markings info, and pics asap.

Brian,

We forgot to get the weight of your wonderful Back Action Parker 1500. Could you please let me know the weight of the whole gun? I very much enjoyed the time we spent together and thank you for replacing the firing pin of my 11-ga #4005.


Richard

The Weight of my back action gun No. 1500 is 9.5 lbs.

We ended up measuring it and found it was a 10g. chambered for 11g. brass shells.
When I had bought it, I thought it was a 12g. with oversized bores.

Very interesting, Brian

What shells can/should I use for #4346 10-gauge?
 

What shells can/should I use for #4346 10-gauge?

Recent purchase. I'm new to lifter and 10-ga Damascus and need info. on what shells are used today.
Chamber is 2.65" long, .848" at bottom and .860" at seat.
I plan to load plastic someday but can buy RST 2-7/8" or use
10-12 or 10-20 gauge little skeeters or chambermates and load 1100 FPS at a soft 7500 PSI also.
Barrels are sound with plenty of wall thickness at chamber and .776 dia. typical. choked .007" LEFT and .010" RIGHT.
Was this designed for brass cases?
Any suggestions or direction to a thread with chamber dimensions would be great.
Thanks a lot! This one should be lethal on squirrels and crows.
Cant wait to light up the old girl. Chamber mates and snap caps in the mail.
-Kirby Lawson

Gun weighs 8# 8-1/2 oz
4# 6-oz unstruck barrel weight
#2 frame? 1.130" between firing pins.

Newby to lifter 10 gauge help
 

No mentors to assist a very excited Virgin Damascus lifter owner make a 140 year old 10 gauge hammer gun
Go boom?

Yes, it was manufactured for use with brass cases.
A lot of us use RST shells and if, as you say they are, the barrels are safe, you can feel comfortable shooting RST ammo.






.

There are plenty of folks on here to help you. You should make sure your barrels are not too thin to shoot. If the gun is in good shape and does not have any mechanical problems, get some RST shells and have at it. That is how many of us started.