Lyman Great Plains

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I just got an unfired Lyman Great Plains rifle in 50 cal. It was made in 2018 by investarm. How good are they the fit and finish looks good.
Probably the biggest ‘negative’ I have heard over the years about GPRs is the rough finish at the muzzle and bore from the manufacturing process that many say takes a couple hundred rounds to smooth out. Definitely not a show stopper. Personally, I debur and polish my all my gun’s muzzles and bores, new or used, before shooting them and have not experienced any issues. Post polishing all the Investarm and Lyman guns I have owed shoot better than I could hold. Any accuracy problems were on me. I guessing you will enjoy your new gun, even if it takes a few tweaks to optimize performance, they all seem to work well.
 
I think you'll be pleased. Have not had any major issues in any of the investarms built ML I've had/have over the years. My current GPR is a good shooter, pleasant and consistent. Had a .50 for years, and currently have a .54. Only issue I've had is with current .54 GPR, had a sharp spot on rifling that was cutting patch. Nothing that a little lapping couldn't take care of.
 
mine is one of my favorite rifles. it is flintlock .54 and the only time ever that it failed me was when i had my sights on a nice black bear.
mine is old enough that it doesn't have the dot matrix .

3 clatches and the bear headed for the west coast after the last one. took the rifle home and it fired first try at the gong. wasn't the bears day to die.
Built my .54 flint from a kit yrs ago and I wouldn't think of parting with it.
Your comment about the clatch reminds me of a nice buck I missed. After four clatches he walked away nonchalantly, not seeming to have paid attention to anything unusual. Determined to get to the bottom of so many non spark snaps I went to my range and discovered a very lit film of rust on the frizzen. A little scrub with scotchbrite and it was sparking 100%. I don't go to the woods now without rubbing the frizzen with scotchbrite.
Experience teaches.
 
I have an older one that I recently purchased from Packrat. I have not been able to put it through its paces as of yet. Still waiting for warmer, dry weather with little to no wind. Also have a couple of health issues going on at the time. I did, however, do one somewhat short range session with it. It appears to be quite accurate out to at least 50 yards best I can tell. It was cold, icy and wind so I was really bundled up, therefore I did not do much testing with it. Hope to get back at it soon.

The only thing I do not like about the rifle is the sharp edge on bottom of the butt stock plate. On my rifle it is sharp and needs to be dressed up a bit, if possible. Other than that, so far I really like my .54 Great Plains Rifle. I can tell you with fact that it is, without a doubt, the most steady rifle I have ever shouldered for offhand aiming. It appears to lock itself in place and is steady-steady.
 
How did you determine what year it was made? I have 3 I would like to find out. Thanks for your help
Just checked mine. At first I thought it was stamped but with a magnifier it shows the dot matrix. It's marked on the barrel 2016.
I'm thinking real late in 2016 because the inspection card says, Inspected By Jesus A. 1/9/2017, along with his employee number.
The only thing I really don't like about it is the metal to wood fit. Everything metal is deep down in the wood. Like 1/16th-1/8th".
 
The only thing I do not like about the rifle is the sharp edge on bottom of the butt stock plate. On my rifle it is sharp and needs to be dressed up a bit, if possible.
This is what I mentioned above... the buttplate is curved and extends over the top of the stock (one piece) as most do. The GPR has another separate flat piece on the underside of the stock that fits up against the bottom end buttplate which creates that sharp edge. The T/C Hawken I have doesn't have any extra metal on the bottom of the stock. Maybe it's meant to protect the butt from getting scratched/marred from sitting on the ground during loading process? I guess one could take a file and break/round that edge slightly and touch up the metal finish? If anyone has dealt with this successfully I for one would like to hear how you did it!
 
Was on a forum this morning with numerous people trying to figure out the twist of a Lyman Plains rifle. Someone posted the Lyman site. I email them to find out what my Lyman from the early 70s was. According to Lyman the 50 cal plains rifle has a 1:60 twist.
If anyone has seen that forum please let me know.
 
This is what I mentioned above... the buttplate is curved and extends over the top of the stock (one piece) as most do. The GPR has another separate flat piece on the underside of the stock that fits up against the bottom end buttplate which creates that sharp edge. The T/C Hawken I have doesn't have any extra metal on the bottom of the stock. Maybe it's meant to protect the butt from getting scratched/marred from sitting on the ground during loading process? I guess one could take a file and break/round that edge slightly and touch up the metal finish? If anyone has dealt with this successfully I for one would like to hear how you did it!

The part on the bottom of the stock is called the toeplate. It's there to protect the wood on that part of the stock. Without it the thin toe would be more vulnerable to damage.
 
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