Inline FabricationStainLess Steel MediaRotoMetals2Lee Precision
Graf & SonsTitan ReloadingWidenersMidSouth Shooters Supply

Results 1 to 10 of 10

Thread: comparing Smith rifling- new vs old

  1. #1
    Boolit Master
    Join Date
    Mar 2005
    Location
    southern Illinois
    Posts
    2,123

    comparing Smith rifling- new vs old

    I've always thought the new Smith rifling system was a bit odd... To these old eyes the grooves are not deep and the lands are not square and sharp. I got a chance to look at a Model 27....wow... It has got real rifling in it!

    Anyone else think this or am I out to lunch?

  2. #2
    Super Moderator

    Preacher Jim's Avatar
    Join Date
    Apr 2014
    Location
    Missouri
    Posts
    4,564
    You are not out to lunch in my opinion

  3. #3
    Boolit Master tazman's Avatar
    Join Date
    Jan 2014
    Location
    west central Illinois
    Posts
    4,531
    I haven't really looked since I only have one new S&W(a 686+). It shoots well with cast so I didn't even think about it.
    I had a problem with a Taurus PT92 that had shallow rifling that wouldn't grip the boolits well enough to stabilize them for me. I swapped the barrel out for a Beretta 92 barrel and never had a problem since.

  4. #4
    Moderator



    Join Date
    Jun 2013
    Posts
    4,892
    The new ECM process they use is interesting in how it’s done. Definitely not the traditional cut rifling.

  5. #5
    Boolit Master
    rintinglen's Avatar
    Join Date
    Jul 2007
    Location
    HB, CA, FOR NOW
    Posts
    4,182
    My experience with the "new" ECM process has been poor. My S&W M-69 leads terribly, despite correct fit and good lube. I am currently working on fire lapping, but that bore was horrible. I will be looking very closely at any future S&W purchases that I contemplate.
    _________________________________________________It's not that I can't spell: it is that I can't type.

  6. #6
    Boolit Master
    Join Date
    Mar 2005
    Location
    southern Illinois
    Posts
    2,123
    rintinglen... I have a friend who started collecting the model 69...he loves the small frame in 44....BUT he had leading issues like you. He had 3 of them at one time... None shot cast well at the start. After a lot of abrasives in the bore, one now shoots pretty good....I think it still leads just a little.... One (hopeless) was traded in on a 69 2.75 model ... It has been the best one out of the box but still could be better...

    We have spent the better part of 2 months working on these... cutting the cylinder mouths uniform and fixing the muzzles...reminds me...look close at the muzzle. All 3 of the 4 inch guns, the muzzle was button rifled but not recrowned. At the end of each groove you could see a bit of metal sticking out past the muzzle.

    Anyway, if you want to know more...ask

    Dale

  7. #7
    Boolit Master
    Join Date
    Mar 2006
    Location
    cody wy
    Posts
    695
    I firelapped ten shots in my model 69. It doesn't lead at all now. Nor do I clean the barrel, there is nothing to clean out. Handiest six-gun I think.

  8. #8
    Boolit Master
    Join Date
    Mar 2005
    Location
    southern Illinois
    Posts
    2,123
    frank505... I would like to know more about this firelapping.... Thanks, Dale

  9. #9
    Boolit Master
    rintinglen's Avatar
    Join Date
    Jul 2007
    Location
    HB, CA, FOR NOW
    Posts
    4,182
    I have 40 shots with 320 grit material through mine, plus at least 80 passes with a hand lap. It is better, but still not good. 40 shots still leave a healthy layer of lead, starting at the forcing cone and going forward. lately I have been shooting other guns and have not had time to get back to the M-69.

    As delivered, the throats were <.429, but Doug Guy took care of that for me. Here's the before photo. Those are Hornady .430 FTX bullets. note that they stop on the ogive. Now all five chambers are as nearly identical as I can measure at .4325. Doug Guy is a master and I heartily recommend his work.
    Click image for larger version. 

Name:	DSCN0462.jpg 
Views:	11 
Size:	51.2 KB 
ID:	221728
    Last edited by rintinglen; 06-07-2018 at 05:33 AM.
    _________________________________________________It's not that I can't spell: it is that I can't type.

  10. #10
    Boolit Master



    Join Date
    Dec 2005
    Location
    Southwestern Ohio
    Posts
    8,185
    I have both old and newer Smiths. I am currently shooting my Model 520 .38/.357 ("L" frame with target sights, 4" composite barrel and titanium cylinder). It is scary accurate and I shoot it well. I have never fired anything in it but my home cast bullets. My 625-8 JM Special is a .45 ACP/.45 Auto Rim and again, it is scary accurate. Again, nothing but my home cast bullets.

    When I say scary accurate, well under 1" at 25 yards off a rest with a variety of loads. I haven't cleaned the barrels of these revolvers for several thousand shots. I just brush out the cylinder with a nylon chamber brush while hot, and wipe off the outside. NO leading and the barrel is always conditioned.

    FWIW
    Dale53

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check