January 30, 2008 at 12:21 am #1425
I was thinking about getting a Sam Yang .45 big bore rifle but had a few questions regarding it.
1. How many good shots does it get on a fill?
2. Can it be modified to shoot close to 250 fpe?
3. What is the actual diameter of the bore of the gun?
4. Would the below mold be easy to use to make .454 round balls?
Here is the link to the site that sells this mold
TylerJanuary 30, 2008 at 2:26 am #32815wvanryperParticipant
> 1. How many good shots does it get on a fill?
The are two power levels, but you’ll probably want to
shoot on high unless you’re just fooling around. On high
you’re looking at maybe 7-8 from a 3000 psi fill before
POI starts to drop too much.
> 2. Can it be modified to shoot close to 250 fpe?
…to read about a 909 modded for something like 270 fpe.
> 3. What is the actual diameter of the bore of the gun?
At least 0.4545 at the muzzle end of mine.
> 4. Would the below mold be easy to use to make .454 round balls?
You can shoot home-cast .454 rounds, but you might not be happy with
the results even if you sort out the best with regard to
sprue flats and mold lines. Depends on the actual diameter
of the product you wind up with.
Hornady .457 rounds (most 0.457+) work a lot
better than smaller home-cast and commercial rounds..
Speer .457 rounds also work well, so you might be
better off looking at a nominally larger-sized mold.
Hornady 255 gr Cowboy bullets at just over 0.454 shoot well,
but not similarly-sized rounds. YMMV, and you’d have to
experiment with the best projectile fit for your bore, but my
experience of “bigger than you might expect” seems in line with
the general consensus.
WilliamJanuary 30, 2008 at 3:15 am #32820
YMMV but I get around 6 good shots out of mine at around 185fpe before POI drops at 50 yards.
I use the .454 rounds in it. Havent tried the .457. Forget .451, may as well be throwing the balls by hand.
It can be modded, but shot count will drop of course with the higher fpe… if you want high FPE to start with, talk to Joe Bontranger. He builds big bores without much wait time and can tune them to your power needs.January 30, 2008 at 3:34 am #32824voltar-1Participant
orrrrr….. 🙂 coould do a Condor convert to .45 and do the 300fpe with RB and 450fpe with Bullets :):):)January 30, 2008 at 3:53 am #32827
I wish I had the know how, Walter……January 30, 2008 at 5:32 pm #32852quote rob3dr:
Who is he? Can you give me his web site?
TylerJanuary 30, 2008 at 6:22 pm #32853
Joe has been making guns for a little while now and more recently has been doing big bores. He made me a QB PCP conversion that I reviewed for his site, you’ll see it on the home page.
The 2240 pistol project on his site is also mine.
He’s also done some innovative work with air shotguns and has made a 20 gauge and is working on a .410 bore shotgun powered by air. The 20 will do slugs at around 430fpe and with shot, great patterns out to 30 yards and beyond.
Great guy to deal with as well.January 30, 2008 at 9:33 pm #32859cygnus-x-d82Participant
to up the power to above 200 fpe, the .45 needs just a few mods…one is a stiffer hammer spring, that gives about 20 fpe
the valve chamber is too small, so drilling alot of holes in its endcap(how many and how big depends on material used in the valve which differ from gun to gun) and that should get you another 20 fpe
lastly i cant remember if its the single tank or double tank model you can drill the transfer port out a little bit more….and that should give you additional 20+ fpe
port and polish internals and that should give you about 5 fpe more as well….
do it all and you have about 250 fpe totalJanuary 30, 2008 at 10:20 pm #32861quote rob3dr:
Thanks for the link. Do you have a idea how much he charges for his .45 magnum gun?January 31, 2008 at 1:06 pm #32902
I dont know…. BUT… Jim Chapman is selling his Bontranger 45 on the American Airgun Hunters forum…. $450 If you are looking for a big bore and are serious about it, may want to jump on that one quickly.February 1, 2008 at 5:29 pm #32998quote rob3dr:
Thanks for the heads up, but it appears I missed out on that one.
I saw his 20 gauge air shotgun and needless to say it is impressive! According to one person, he can shoot a 390gr. slug at 700 fps for over 400fpe for 5 shots! I might start looking at his shotgun too as it would be pretty cool to have a air shotgun.
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