|
|
03-19-2017, 09:16 AM
|
|
Member
|
|
|
Join Date: Feb 2008
Location: Northeast TX
Posts: 1,280
Likes: 623
Liked 1,001 Times in 414 Posts
|
|
27-2 Twist Rate for 38 HBWC
I acquired a very nice 27-2, 8 3/8" barrel and benchresting 38 wadcutters it doesn't group them as well as it should at 25yds. I'm quite disappointed.
Shooting jacketed bullets at near max loadings it shoots one hole groups.
I'm thinking the barrel twist rate might have something to do with this.
Does anyone know?
|
03-19-2017, 09:30 AM
|
|
Member
|
|
|
Join Date: Oct 2014
Location: South Louisiana
Posts: 5,346
Likes: 11,606
Liked 9,019 Times in 3,193 Posts
|
|
My old 4th edition of the Hornady reloading manual used an 8 3/8" 27 for load development. They have the twist rate listed as 1 in 18 3/4 inches in the book.
|
03-19-2017, 09:36 AM
|
Suspended
|
|
|
Join Date: Jan 2007
Location: Sandy Utah
Posts: 8,747
Likes: 1,590
Liked 8,914 Times in 3,554 Posts
|
|
The twist rate for nearly all center-fire S&W revolvers is 18 3/4", including all target types such as the K-38. The only exception is the .44 Magnum guns. Twist rate is not the problem is your gun does not shoot wad-cutters well.
|
The Following User Likes This Post:
|
|
03-19-2017, 10:03 AM
|
|
US Veteran
|
|
|
Join Date: Jan 2010
Location: The wet side of Oregon
Posts: 6,292
Likes: 8,819
Liked 7,785 Times in 2,377 Posts
|
|
If it's any consolation, my 8 3/8" 27-2 didn't shoot them well either.
__________________
-jwk-
US Army '72-'95
|
03-19-2017, 10:18 AM
|
Member
|
|
|
Join Date: Aug 2007
Location: Oklahoma
Posts: 8,161
Likes: 3,622
Liked 5,211 Times in 2,174 Posts
|
|
I have "cured" some revolvers that were inaccurate with HBWC lead bullets by cleaning ALL the copper fouling out of the barrel and then shooting nothing but lead for the evaluation. After some fouling shots, the miscreant revolvers settled down and shot normal HBWC loads well. Some shot my loads well, but did not like the owner's loads; HBWC don't like higher speed and may even separate into two parts.
__________________
Science plus Art
|
03-20-2017, 12:56 AM
|
US Veteran
|
|
|
Join Date: Sep 2010
Location: New Iberia, Louisiana
Posts: 4,588
Likes: 25,427
Liked 3,380 Times in 1,736 Posts
|
|
I have a Douglas barrel blank and 1x14twist 38 special is stamped on the breech end of the barrel. Colt twist rates were pretty close to 1x14 twist. Maybe one reason Colt barrels were used on the Smython conversions on S&W revolvers. Frank
|
03-20-2017, 02:47 PM
|
|
Member
|
|
|
Join Date: Feb 2008
Location: Northeast TX
Posts: 1,280
Likes: 623
Liked 1,001 Times in 414 Posts
|
|
From what all I can read other places a 14 twist stabilizes 148gr HBWC and 180gr cast bullets a lot better than factory 18.75 twist.
Also all aftermarket 38 and 357 barrels that I know anything about are 14 twist.
|
03-21-2017, 12:52 PM
|
|
Member
|
|
|
Join Date: Feb 2008
Location: Northeast TX
Posts: 1,280
Likes: 623
Liked 1,001 Times in 414 Posts
|
|
I just talked to Clark Custom Guns this morning and they said they install only 1/12 twist barrels on all the 38 and 357 barrels they install. They said the factory S&W barrel twist of 1/18.75 is too slow to stabilize wadcutters well.
|
|
Posting Rules
|
|
|
|
Similar Threads
|
Thread |
Thread Starter |
Forum |
Replies |
Last Post |
Help with rate of twist
|
Aussie Bruce |
S&W Revolvers: 1961 to 1980 |
2 |
03-05-2014 10:48 AM |
M59 twist rate
|
forestswin |
Smith & Wesson Semi-Auto Pistols |
1 |
02-10-2014 08:38 PM |
twist rate of M+P .40
|
machz1 |
Smith & Wesson Semi-Auto Pistols |
14 |
12-11-2012 01:59 PM |
Rate of twist
|
Jebus35745 |
S&W-Smithing |
6 |
05-04-2010 08:53 PM |
204 twist rate
|
pownal55 |
Reloading |
3 |
03-09-2009 02:41 PM |
|
All times are GMT -4. The time now is 03:54 PM.