Let me be clear I have never fired a round with Trailboss. However my shooting buddy and spotting partner uses it exclusively in his Browning 38/55. Loads with store bought bullets on a progressive press too.  He's easily the best shot at our club and few times he's shot Schuetzen with that outfit has done very well.

What I have observed, and watch at least a thousand of his rounds go down range a year, is he gets  low shots that are unexplained.  Not much velocity either, everybody remaks how it seems to take forever to hit our Gong.   It may be the trailboss or that progressive press causing the drop shots. He pre loads the Mikori high wall trigger and shoots with the best set trigger offhand shooters. No way I could shoot that trigger.

What ever, his winning ways are in spite of his outfit not because of it.  High power or Small bore Silhouette rifle. Single Shot Rifle, Vintagers cup with a double rifle or Double Barrel Shot Gun in the SxS classic he's a factor because he knows how to shoot.   

Couple of other club shooters say we ought to outfit him with a CPA, load his ammo, and take him around the country placing side bets. Fact is he does not care a hoot about rifles or loads. No interest at all, only cares about hitting targets. We could learn something from that philosophy

Boats

I went to the range and the results are mixed.  The rifle functioned flawlessly.  The gun took a bit of getting used to as the drop at the stock is much greater than anything I have ever shot before.  Once I raised up my shooting rig it worked out much better.  This is more than I can say for the sights.  I need to work on figuring them out.  Fist time with a tang aperture and it gave me some trouble.  The loads were mixed as well the mild charge of 3031 was a bust I put a few on the paper at 25 yds and then switched to 50yds and they barely hit the bottom of the target. The bp rounds seemed to be much better and I was able to put my last 5 shots in a somewhat respectable group. On the target first shot is high and right and le last 5 are the group to the left of the bull. On the way home i checked back at the gunshop and they must have got a shipment and i was able to pick up the 4227 and 4759 so i will try the 4759 in the next batch.
I appreciate all the info as i am coming late to this reloading game and i can use all the help i can get.

MDev

How about a few pictures of those sights, F&R they can be a puzzle. Some of us have worked with similar before.

Boats

Front sight as well

the groove measurement is .375 and the twist is 1 in 16 inches,

Actually the sight picture looks pretty goot when i look down range. Its just that when i make adjustments they do not seem to have any (or correct effect) I read a couple of guides and i think i need go back to the range ans step through the sighting in process again and pay attention to keeping good body position and consistantly placing my head/eye in the same position for each shot.  As i said this rifle has quite a bit more drop than i am used to. It will take some getting used to.  Just wish i could get a more conventional sight to mount on this oddball tang.

Might be they work backwards.  US Receiver sights generally you push the point of impact with the screw. Screw down tighter the point of impact moves down

European opposite. Way the Germans think about it is screw the sight down they are pushing the paper down to meet the bullets point of impact

Paul Shuttleworth at CPA Rifles sells adaptors to fit Redfield Reciever sights like the Palma Olympic etc to Unertl style bases. Could be something like it would work and not alter the rifle.

Boats