Armed Bear,
First allow me to formally welcome you to THR. I have really enjoyed your posts , participation and contributions!
Granted I grew up H&R Toppers, great guns. Always been a fan for what I call another best kept secret, the Youth Model 20ga single shot shotgun.
NEF was part of H&R, and I tried one. In short - GET ONE!
Basically a H&R with NEF on the thing. Works the same, looks the same, just different letters.
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As you know about the Rule of 96s, 20 ga works better than a 12 gauge in this type of gun.
Youth Model is easy to tote and a big person can shoot a small gun, a small person cannot always shoot a bigger gun. NO need to shorten a gun and risk cutting too short and getting BATF troubles. comes with a Recoil pad, and Fixed Mod bbl.
I kid you not on this next part: This fixed Mod bbl throws some of the best pellet patterns AND slug groups I have shot/ seen!
I was so impressed, I bought others, then when I wanted to get one for my mom...I prefer Wood and Blue...my gun guy messed up the #'s and got the black wood with "white" receiver.
This gun also proved to be just like its wood and blue kin... I mean easy guess, a dozen folks bought one after shooting the one I got for mom.
Folks think about cutting down a 12 bore,single shot Why? 12 ga are light and with payload hurts, add no choke and no recoil pad on most...patterns pitiful and slugs worse.
Get the H&R / NEF , factory, PC, mod choke in 20 ga and be done with it. Looks just like a youth model shotgun (which in fact it is) and no worries about why a gun whacked.
I took a limit of 15 doves with 12 shells - taken varmits out to 50 steps with slugs...so yeah it shoots.
Also check into the fact one can get a rifle barrel that will work on the receiver as well. See the website for details.
I could not get the NEF site to come up, instead go here :
http://www.hr1871.com/Firearms/Shotguns/topper.aspx
Topper® Junior
20 Gauge (SB1-258)
HTH
Steve