24hourcampfire.com
Previous Thread
Next Thread
Print Thread
Hop To
Page 2 of 2 1 2
Re: Lyman 358429 [Re: J23] #15423209 11/16/20
Joined: Jun 2007
Posts: 19,643
H
HawkI Online Content
Campfire Kahuna
Online Content
Campfire Kahuna
H
Joined: Jun 2007
Posts: 19,643
Originally Posted by J23
Originally Posted by TheKid
I never thought I had trouble with the 358429, cast and shot thousands with an old single cavity Lyman. Until I started shooting longer range regularly. I started a thread here a while back about it, they shoot fine until I stretch it out to 75 yards or more. Then I get really erratic flyers, like 2’ off in any direction flyers. I haven’t really tried to sort it out yet, I’ve been busy and it’s been hot. But I did buy a 38-150KT RCBS mold as one possible solution. I’ll start casting more this fall when it cools down a little and maybe get to the bottom of it, or maybe just go with the RCBS.


Never had any luck with the 358429 in either of my Blackhawks. I've tried crimping over the driving band as the cylinders are too short for a "full length" 357. I tried trimming .10" off 357 brass, and using 38 Special brass. Tried H110, 4227, Unique and 2400... Nothing consistent.

Switched to the RCBS 38-150-KT, and never looked back.


Im curious as to what makes the Blackhawk cylinder too short?
The bullet nose should be flush with the cylinder face in this instance.



BP-B2

Re: Lyman 358429 [Re: HawkI] #15423235 11/16/20
Joined: Sep 2010
Posts: 1,765
J
J23 Offline
Campfire Ranger
Offline
Campfire Ranger
J
Joined: Sep 2010
Posts: 1,765
Originally Posted by HawkI
Im curious as to what makes the Blackhawk cylinder too short?
The bullet nose should be flush with the cylinder face in this instance.


In either of my Blackhawks, a 50th Anniversary model (a flattop) and a Lipsey's Flattop, seating a 358429 into full length 357 Magnum brass crimped into the bullet's crimp groove produces a cartridge overall length which is just a hair too long for the cylinder, and will hang up as it rotates into battery.

I think it has something to do with a shorter cylinder on the Flattop models?

Last edited by J23; 11/16/20.

"Ignorance is acceptable, because you can remedy it with knowledge and research. Stupidity is when you guard your ignorance."
Ted Nugent
Re: Lyman 358429 [Re: RiverRider] #15423394 11/16/20
Joined: Jun 2007
Posts: 19,643
H
HawkI Online Content
Campfire Kahuna
Online Content
Campfire Kahuna
H
Joined: Jun 2007
Posts: 19,643
Must be.

I know in the New Model its not an issue.

The Flattops were dimensioned like the original Blackhawks.

Hard to keep up with!



Re: Lyman 358429 [Re: RiverRider] #15429782 11/18/20
Joined: Dec 2004
Posts: 6,694
RiverRider Offline OP
Campfire Tracker
OP Offline
Campfire Tracker
Joined: Dec 2004
Posts: 6,694
My Blackhawk is a 3-screw flat-top, and I have no trouble using the 358429 in .357 cases crimped in the crimp groove behind the first driving band. If it's a really close fit for go-nogo, then maybe just trimming cases a few thousandths shorter makes the difference?

I should have updated this thread eight months ago...but "better late than never" will be my defense. I was able to pare my groups down a bit with a little more practice, but in the end the 358156 shoots about a half inch better than the 358429 in my gun. My handgun skills are nowhere near where they were a couple of decades ago due to heavy concentration on rifles at the expense of handguns. My conclusion is that the 358429 shoots almost as well as the 358156, but not by a significant amount and certainly not enough to make an appreciable difference for my uses.

Maybe I'll get back into handguns more this winter...I have an inherited New Frontier I need to wear out and a mold for it that's never even been warmed up, along with a few hundred pounds of good alloy out in the garage. A little more practice could never hurt, and there's going to be a cataract surgery in the next couple of years which may be a blessing (or not, I guess), God willing and the creek don't rise.


Originally Posted by gonehuntin
Give a communist a helicopter ride, he flies for an afternoon. Throw a communist out of a helicopter and he flies for the rest of his life.....



Re: Lyman 358429 [Re: RiverRider] #15434081 11/19/20
Joined: Jun 2007
Posts: 19,643
H
HawkI Online Content
Campfire Kahuna
Online Content
Campfire Kahuna
H
Joined: Jun 2007
Posts: 19,643
I'd try heat treating them, if your still up for it.



IC-A

Re: Lyman 358429 [Re: RiverRider] #15440488 11/21/20
Joined: Nov 2007
Posts: 6,917
T
T_O_M Offline
Campfire Tracker
Offline
Campfire Tracker
T
Joined: Nov 2007
Posts: 6,917
358429 .. that's the 170 grain mold? I wonder if it could be a twist issue. I remember Veral Smith writing about selections of one of his designs .. LFN over WFN .. if range was over something like 50 or 75 yards. I think the issue was marginal twist and a possible answer is more velocity. So .. not sure what max is for 2400 with those 170s, but maybe switch to Win 296 and push the throttle a little bit farther. .. a guess, something to try, with no promises made. smile

Tom


Anyone who thinks there's two sides to everything hasn't met a M�bius strip.

Here be dragons ...
Re: Lyman 358429 [Re: RiverRider] #15440533 11/21/20
Joined: Jun 2007
Posts: 19,643
H
HawkI Online Content
Campfire Kahuna
Online Content
Campfire Kahuna
H
Joined: Jun 2007
Posts: 19,643
An imbalaced or off center nose requires more stabilization; its even dicier with a long, unsupported nose, which the 358429 has.

The WFN often needs more speed than the LFN and his OWC designs are even more range limited, this due to BC. A std. wadcutter, even more so.

This is why I recommend nose first sizing, for everything.

I suspect its a stripping on the rifling engagement or base deformation as the issue, all else equal.

The Thompson bullet is pretty similar, but uses a gas check.

Heat treating or increasing base hardness cuts down on the stripping and sized correctly, decreases base deformation and increases accuracy, which is what a gas check does, primarily.



Page 2 of 2 1 2

Moderated by  RickBin, SYSOP 

RR1
Who's Online Now
123 registered members (Adamjp, 35, 260Remguy, 444Matt, 18 invisible), 944 guests, and 773 spiders.
Key: Admin, Global Mod, Mod
RR2/3










Fish & Game Departments | Solunar Tables | Mission Statement | Privacy Policy | Contact Us | DMCA
Hunting | Fishing | Camping | Backpacking | Reloading | Campfire Forums | Gear Shop
Copyright © 2000-2020 24hourcampfire.com, Inc. All Rights Reserved.
 
Powered by UBB.threads™ PHP Forum Software 7.7.3
(Release build 20190728)
PHP: 7.3.24 Page Time: 0.039s Queries: 15 (0.004s) Memory: 0.8070 MB (Peak: 0.9092 MB) Data Comp: Zlib Server Time: 2020-11-29 08:52:24 UTC
Valid HTML 5 and Valid CSS