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I agree. I think .016 is wrong. I thought I had read some where that the groove depth for a GPR was .012. I'll have to recheck.

Got another question. have you built and ML from a kit?

If it had a slower twist I'd be interested. Also I'd be a little concerned about what looks like pitting at the muzzle

Are there any ML experts here who knows what the measurements of the lands and grooves are for the .50 cal Investarm Gemmer Hawken are. I know the bore is probably .500-.501 but you need the other 2 figures to know what's the best size round ball and patch to use.

Wish the barrels were just the opposite. .32 cal Traditions barrel and .50 Green Mountain barrel

On Pedersoli webpage states 1:48 twist

Been there but they don't have any bore specs for the .50 cal Investarm Gemmer Hawken. Sent emails to both Investarm and Muzzle-loader asking for the bore specs

Wish it were a 1:60 or slower twist. Good luck on the sale.

I agree. Right now I'm trying to get some info on what the depth of the groves are i.e. shallow .008-.010 or deep .012-,016 and with there being an odd number, 5. of lands and groves one can't do the standard. I am thinking that since GPR have .012 deep groves this one may be the same.

I'm looking at getting a .50 cal Investarm Gemmer Plains Rifle. Also any information you might have on it would be greatly appreciated. Thanks

Looking for opinions on the .50 Great Plains Rifle over the new Signature Series Great Plains Rifle. Better. Equal?

I am leaning more towards the Underhammer kit, .50cal 1X36" Green Mountain barrel. I think once it's finished, if I do my part, it will be a $800+ ML

Good for you.

Actually there isn't that much to do. I'm paying those at Pecatonica Rifle to do everything to the barrel so that all I have to do is maybe polish it some and then brown and put on sights. The stock forearm is already inletted for the barrel and the butt stock looks like it would just need a...

1) .50 cal Lyman Great Plains rifle 672 2) .50 cal Underhammer kit from Pecatonica Rifle 650 Items to complete kit 100 total 750+ 3) .54 cal Lyman Signature Series Great Plains rifle 806

That's what I was saying. It's not like the ones reviewing the Pedersoli Blue Ridge were amateur shooters. Plus it was 100 yards not 10 LOL

Hi. I also looked at and did a little research of this .54 Pedersoli being carried by Cabelas. One thing I look for is accuracy and 4-5" groups at 100yds are not that good. Granted that's a long ways but there are other MLs that can that in half. I'm looking elsewhere but that's just my opinion...

This is a toss up. 1) .50 cal Lyman Great Plains rifle for $672 or 2) .54 cal Lyman Signature Series for $805? That's $133 difference between the 2

Ok thanks.