Sabotloader,
Methinks you're giving up on the peep sighttoo quickly. Let me pass along some tips that might help.

I've got tang peeps on a GM barreled Hawken, a Greyhawk, and a GPRas well as a peep on one of my System 1s (remember them?) and a couple of Marlin 1894s. The Hawken and Greyhawk are my pets and I got a deer with each this year.

One of the problems with the T/C sight is that the aperture (peep hole)it is supplied with is far too small and lighting difficulties will wash out the sight picture (either low light or bright light from behind). It is quite precise, however, and good for use at the range.

The ghost ring, on the other hand, is too imprecise for 100yd shots. For 50 yarders it's OK, but beyond that you start to question what you're doing.

The answer to this is the Williams Regular 3/8" x .093" aperture which will screw right into the T/C (or Lyman) sight in place of the stock aperture. This gives you a more open aperture that holds up better in poor light. For even better poor light performance, the 3/8" x .125" can be used...though, again, you're sacrificing precision with that big an aperture; at least it seems that way. You can get them at Midway. Part Number for the .093 is 824-695, for the .125 it's 917-413. Cost is $6.29 each. Just received a couple more from Midway a few days ago. Realized the Greyhawk still had the stock aperture while I was stalking a buck this Fall. Setting sun behind me washed out the sight picture. Went with the ghost ring to shoot him; luckily shot was only about 50 yards.

Cayugad's comment about barrel switching is true. The rear sight on each barrel must come off and the gun sighted in with the new barrel UNLESSthe barrel hasa Lyman Folding Leaf rear sight, or something similar, and has been previously sighted-in using the open sights.

Before shooting,"sight-in" the aperture sight on the bench. Put the gun in a gun vise, leave the rear sight up andposition the aperture sight (elevation & windage) so that the correct open sight picture (front bead in rear notch)is perfectly centered in the aperture. If you can get a clear picture of the lined up open sights, go with your tightest aperture for best precision. Once you've got front, rear and aperture sights all lined up, just fold down the rear sight and go hunting.

You may recall that the System 1 barrels were provided with folding leaf rear sights. When I put an aperture sight on mine, I found I could do a very good job of sighting in the aperture on the benchusing the open sight picture. It worked so well, I set upthe GPR the same way.

Well, it might be worth a try, anyway. I had to go this way because of aging eyes. Worked good for me but YMMV. Oh yeah, a fiber optic front sight in the .093 aperture gives a dynamite sight picture....but the fiber optics don't help in low light as much as you'd think.
Bob