RugerForum.com

This is a Ruger Firearms enthusiast's forum, but it is in no way affiliated with, nor does it represent Sturm Ruger & Company Inc. of Southport, CT.
It is currently Tue Jun 18, 2019 9:49 am

All times are UTC - 7 hours [ DST ]




Post new topic Reply to topic  [ 16 posts ]  Go to page 1, 2  Next
Author Message
 Post subject: Forcing cone erosion.
PostPosted: Thu May 16, 2019 12:31 am 
Single-Sixer

Joined: Fri May 09, 2008 4:38 pm
Posts: 448
Location: Oro Valley, Arizona
Does this look like forcing cone erosion to you?
The gun is a fairly new Blackhawk in .357 with about 200 rounds through it. Mostly .357 with some 9mm.
My .357 load consists of a 158g Ranier hollow point over 10.5g of Blue Dot. This is below SAAMI limits and there are no pressure signs. I did a Bing search and found some folks asking about forcing cone erosion with Blue Dot. It will be a shame if I have to switch to something else. It is a very accurate load. What do you think?

Image


Top
 Profile  
 
PostPosted: Thu May 16, 2019 5:07 am 
Bearcat

Joined: Mon Jan 16, 2017 8:10 am
Posts: 93
Location: Mid Ohio.
andyo5, I Have NEVER Heard Of Forceing Cone Erosion With Only 200 Rds. If You Are There's Something Else Going On. Just My .02.


Top
 Profile  
 
PostPosted: Thu May 16, 2019 7:09 am 
Single-Sixer

Joined: Wed Nov 02, 2005 2:01 am
Posts: 485
Location: South West Indiana
Looks ok to me, a little rough but I don'e see erosion.


Top
 Profile  
 
PostPosted: Thu May 16, 2019 11:05 am 
Single-Sixer

Joined: Fri May 09, 2008 4:38 pm
Posts: 448
Location: Oro Valley, Arizona
recumbent wrote:
Looks ok to me, a little rough but I don'e see erosion.


Do you think that a Lewis Lead Remover (now called Hoppe's Lead Remover) could cause the edge roughness in the photo? I would not have thought so, since the screen is bronze and the cone shaped mandrel it is mounted on is aluminum. But I have used a Lewis Lead Remover on this gun.


Top
 Profile  
 
PostPosted: Thu May 16, 2019 11:35 am 
Single-Sixer

Joined: Fri May 09, 2008 4:38 pm
Posts: 448
Location: Oro Valley, Arizona
Hmmm. I am seeing this also on some of my other .357 revolvers, like the Uberti and the GP100 pictured below. I'm wondering whether this might be tool chatter from the manufacturing process.

GP100
Image

Uberti Cattleman
Image


Top
 Profile  
 
PostPosted: Thu May 16, 2019 12:43 pm 
Single-Sixer

Joined: Wed Nov 02, 2005 2:01 am
Posts: 485
Location: South West Indiana
I have 2 GP100, one in 357 mag and 1 in 327 Fed mag. I just checked them both and both of them are smooth. I shoot cast lead and neither one of them leads the barrel.


Top
 Profile  
 
PostPosted: Thu May 16, 2019 1:24 pm 
Single-Sixer

Joined: Tue Aug 03, 2010 4:03 pm
Posts: 380
Location: Twin Cities, MN
This is forcing cone erosion:

https://photos.app.goo.gl/ygxTJzpa8ZTnEEYH8

This is my 1st GP100 that now has about 15000 rounds through it, mostly with 158 grain bullets and 16.4 grains of Hodgdon's Lil'gun.

_________________
--Joseph
I love my revolvers, because I hate chasing brass.

Somewhere in Georgia, Jimmy Carter is ecstatic. You can see him strolling along melodiously muttering, "I'm number two!"


Top
 Profile  
 
PostPosted: Thu May 16, 2019 8:05 pm 
Single-Sixer

Joined: Fri May 09, 2008 4:38 pm
Posts: 448
Location: Oro Valley, Arizona
Well sports fans, I have examined a number of my guns through the magic of photography and have reached the following conclusion:
Guns that have shot this load to any extent show forcing cone erosion. Guns that have shot few or none of this load show no erosion. My S&W model 686 has shot some pretty stout loads with H110 and Alliant 2400 in quantity. Perhaps 30 rounds with this Blue Dot load. It shows only minor erosion, no worse than the Blackhawk which is the main subject of this thread. I think I have an answer.


Top
 Profile  
 
PostPosted: Thu May 16, 2019 9:29 pm 
Hawkeye

Joined: Fri Apr 03, 2009 7:01 pm
Posts: 7027
Location: People's Republik of Kalifornia
Yep, you guessed it, it's minor erosion. I haven't ever used enough blue dot to experience it. But I did pick up and old model flat top 357 that was shot a lot, just don't know with what.

But it had erosion worse than this: https://photos.app.goo.gl/ygxTJzpa8ZTnEEYH8

The good news is, the accuracy was still great.

The other good new is I bought it to make a mid frame old model .44 Spl. which is what it is now.

The original 357 barrel I gave to a friend and installed it for him on his old model. He was well aware of the forcing cone erosion but the barrel and labor were free. Some of the erosion was removed establishing a proper barrel/cyl gap. And having fired it, he's perfectly happy with the barrel's performance and doesn't use blue dot, so he's happy.

The bad news is...well there's no bad news.

_________________
Jim
Ruger single action "collector, accumulator, builder and shooter"
NRA Life
CRPA Life
CRPC Life
SASS Life
SWCA
RCA


Top
 Profile  
 
PostPosted: Thu May 16, 2019 9:35 pm 
Single-Sixer

Joined: Fri May 09, 2008 4:38 pm
Posts: 448
Location: Oro Valley, Arizona
Yeah, Hondo. Looks like I will be moving on to one of my other good loads, such as 15.7g of H110. I get better accuracy with 14.5g of 2400, but that load is hard on guns and unpleasent to shoot. My Uberti actually locked up while I was shooting that load and I had to disassemble it.
I'm also wondering about MP-300 from Alliant. I've never tried it but it is supposed to be for magnum revolver loads.


Top
 Profile  
 
PostPosted: Fri May 17, 2019 12:57 pm 
Blackhawk

Joined: Thu Dec 09, 2010 1:39 pm
Posts: 913
Location: PA
H110 , 2400, 4227, N110 are my go to magnum powders, with a heavy preference to H110 and 2400.
Unique for less than full throttle.

I don't think I would have considered Blue Dot in a magnum application. I used it years ago in 9mm and had some odd performance at or near top end loadings. From my understanding when loads get on the hot side it is prone to pressure spikes.

Another powder to say away from in magnum revolvers is LilGun. That powder has a well documented history of throat and forcing cone erosion in magnum powders.


Top
 Profile  
 
PostPosted: Fri May 17, 2019 3:20 pm 
Single-Sixer

Joined: Fri May 09, 2008 4:38 pm
Posts: 448
Location: Oro Valley, Arizona
98Redline, I got some promising results this afternoon with 7.5g of Unique. I am looking for a higher power load for Silhouette competition and a moderate load for my single actions.
Yes, I have also heard that LilGun can also cause erosion.

Have you ever tried MP300, W231, or BE86 in this caliber?


Top
 Profile  
 
PostPosted: Fri May 17, 2019 3:30 pm 
Hawkeye
User avatar

Joined: Thu Feb 22, 2007 2:01 am
Posts: 14796
Location: So. Florida
andyo5 wrote:
98Redline, I got some promising results this afternoon with 7.5g of Unique. I am looking for a higher power load for Silhouette competition and a moderate load for my single actions.
Yes, I have also heard that LilGun can also cause erosion.
Its a shame about Blue Dot. It outperforms everything else in my revolvers.

Try Accurate #9 near max and you should have a good powerful load. I hate to hear what you have said about BlueDot as I have shot quite a bit of it and really like it. Now I have some checking to do. :roll:

_________________
Van Morrison - Brown Eyed Girl (Original Version)

https://www.youtube.com/watch?v=kqXSBe- ... 325701CE9C


Top
 Profile  
 
PostPosted: Fri May 17, 2019 5:28 pm 
Single-Sixer

Joined: Fri May 09, 2008 4:38 pm
Posts: 448
Location: Oro Valley, Arizona
Jimbo357mag wrote:
andyo5 wrote:
98Redline, I got some promising results this afternoon with 7.5g of Unique. I am looking for a higher power load for Silhouette competition and a moderate load for my single actions.
Yes, I have also heard that LilGun can also cause erosion.
Its a shame about Blue Dot. It outperforms everything else in my revolvers.

Try Accurate #9 near max and you should have a good powerful load. I hate to hear what you have said about BlueDot as I have shot quite a bit of it and really like it. Now I have some checking to do. :roll:



It may depend on your load. If it is milder than mine, maybe you will be alright. Hopefully you did not use Blue Dot with 125g or lighter bullets. Hodgdon has warned against that it is dangerous to do so.


Top
 Profile  
 
PostPosted: Sat May 18, 2019 6:06 am 
Single-Sixer

Joined: Thu Nov 24, 2016 4:52 pm
Posts: 201
Location: midwest usa
I have found that 14.5 grains of 2400 behind a 158 gr xtp to be very accurate, in my 6" gp100, you might give it a try with your rainier hp, I repeat very accurate.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 16 posts ]  Go to page 1, 2  Next

All times are UTC - 7 hours [ DST ]


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Group