PTG or Mansion 700 action blue print tools

Discussion in 'Gun Project Questions & Gunsmithing' started by Spotshooter, Jun 22, 2019.

  1. Spotshooter

    Spotshooter

    Joined:
    Dec 26, 2018
    Messages:
    16
    I’m getting ready to pick up the tooling to accurize 700 actions.

    Any plus / delta between these two you guys could share.
     
  2. rgc54

    rgc54 Silver $$ Contributor

    Joined:
    May 19, 2006
    Messages:
    60
    It would be more true if the work was completed in a spider in a lathe Tool deflection and all. But either of the truing sets named above will get you close. Remingtons will shoot very well with a good straight chamber on a good barrel and just the lugs lapped and action face squared. YMMV
     
    Danley and hoz53 like this.
  3. Dusty Stevens

    Dusty Stevens COVFEFE- Thread Derail Crew Gold $$ Contributor

    Joined:
    May 8, 2014
    Messages:
    13,849
    Save your money and get a good internal threading tool and a very nice boring bar. Dont skimp here. I use carmex full profile
     
    Bataction, geo.ulrich and hoz53 like this.
  4. Shawnba67

    Shawnba67 Silver $$ Contributor

    Joined:
    Aug 22, 2016
    Messages:
    1,047
    I believe the Manson set uses a tapered bushing in the bolt raceway, where the ptg uses several different sizes for fit snug. Ive read several reviews where the tooling is stiff enough to cut only on the high parts. I kinda think that on a bad action the recut threads could have a wierd profile once a good centered thread is cut into a cockeyed one, but V threads self center so probly more an acedemic issue than anything.
    After that I base my $$$ on experiences with the company.

    Has anyone else noticed how the same guys that spend the first quarter of the day saying its silly to true a 700, then that most of the guys truing actions are making them worse. Then after lunch its how terrible the Piloted truing kits are, and then back to the lathe is the only right way to probly make it worse!
    Do they have a contractual obligation to buy all these ruined 700's? Why do they care so much?
     
  5. Dusty Stevens

    Dusty Stevens COVFEFE- Thread Derail Crew Gold $$ Contributor

    Joined:
    May 8, 2014
    Messages:
    13,849
    He didnt ask whether he should true it or what the application is. He asked about the kits- i have both and neither one will blueprint an action. The bar flexes too much to tap cut an off center thread. I do use the ptg mandrel to indicate the action in a cathead fixture to do the action work
     
  6. DaveTooley

    DaveTooley Silver $$ Contributor

    Joined:
    Sep 29, 2008
    Messages:
    787
    I've used Manson's since he came out with it. No complaints. Is it perfect? Probably not but how many actions have just had the receiver faced trued and the bolt lapped and they shot great. You reach a point of diminishing returns very quickly. I've checked before and after on just thread alignment several times. Manson's tooling gets it very very close to a "custom" action.
     
    boltfluter, Jesswil61 and Danley like this.
  7. Spotshooter

    Spotshooter

    Joined:
    Dec 26, 2018
    Messages:
    16
    I don’t think I’ll (hopefully) need to ream the bolt races, but to get complete alignment to resurface the lugs, shoulder and then fix the threads I’ll definitely need the mandrel, and bushings. The rest I can do with my lathe, I bought 2 of each of what I think are the best action / bolt jigs so I’m definitely set there.

    I’m thinking that I can pick up a couple 700’s and blue print them for Pdog guns for myself to start. My PRS gun will be a custom action so it should be tight spec’d right off the shelf.

    I do have carmex for internal threading.... :)
     
    Dusty Stevens likes this.
  8. tobnpr

    tobnpr

    Joined:
    Dec 3, 2010
    Messages:
    234
    Like Dave, I use Manson's.
    Works for me...waaay faster and results indistinguishable from single-pointing.
    Not to mention, I don't miss the pucker factor that comes with single-pointing threads on a customer's receiver.
     
    Jesswil61, DaveTooley and Danny1788 like this.
  9. Jesswil61

    Jesswil61 Gold $$ Contributor

    Joined:
    Apr 3, 2014
    Messages:
    63
    I am no expert by any fashion however, I am trying to understand how the bar is flexing to an extent that affects the threading when it is being guided by a match fitted bushing in front and behind either the reamer or tap?
     
  10. GenePoole

    GenePoole

    Joined:
    Jan 8, 2017
    Messages:
    344
    The worst RR action I have done was about 10 thou (0.010 in.) out-of-round. All the RRs I've done are 5 or more thou out-of-round. I don't see any way a tap based device could clean these up.
     
  11. DaveTooley

    DaveTooley Silver $$ Contributor

    Joined:
    Sep 29, 2008
    Messages:
    787
    Just my opinion but the threads are the least important part of the truing process. 30+ years ago truing wasn't always part of the process of building a custom rifle. It meant $$$ and most didn't want to spend the money. I can't tell you how many I did just by running a +.010" over tap in to clean up the treads and get a consistent size and finish. A square shoulder and slightly loose threads and they all shot fine.
     
    rangertim, Danny1788, Boyd L. and 4 others like this.
  12. tobnpr

    tobnpr

    Joined:
    Dec 3, 2010
    Messages:
    234
    ^^^
    Some years ago I called and spoke with DM about the tooling and the general process. He made exactly the same point as this...I remember him commenting on thread fit, that guys bragging about "lapping" their threads to the receiver gnat's ass tight had it all wrong...

    Threads align the parts, the mating shoulders of barrel and receiver face are the critical surfaces.
     
    rangertim and Boyd L. like this.

Share This Page