Gunwerks GRB

Discussion in 'Gear Talk: What to Buy? and Gear Evaluations' started by OLEJOE, Aug 12, 2018.

  1. OLEJOE

    OLEJOE

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    I did a search but came up empty. Has anyone tried 1 of these and what are your thoughts on it? Anyone have any thoughts or recommendations about these actions? I’m thinking about doing a build with one and would like a little more information if available. Thanks
     
  2. boltfluter

    boltfluter

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    A very nice action for the money. Borden bumps and a great extraction set up. Dual cocking cams and a Tri-Lock recoil lug included . What's not to like. If I needed another action I would be grabbing one for 750.00 on sale. Smokin deal.:D:D Plus I can flute the bolt for you!!:D:p

    Paul
     
  3. OLEJOE

    OLEJOE

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    Thanks for the reply. All the features look great to me also. The side mount bolt release and machined for the Wyatt’s mag box are features I would want also. I would really like to hear from someone who has used one for a build and what they liked or disliked about it and how it operated. I’ll keep the bolt fluting in mind. Thanks again for the reply.
     
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  4. boltfluter

    boltfluter

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    Joe,

    Having had about 5 or so bolts in the shop I can tell you the quality of the bolt is very good. I have a fixture that goes in place of the firing pin assy for fluting. The fixture is .001 under the bolt body bore and has fit every bolt so far, with no issues. This alone speaks of a quality product. I to, look forward to hearing from an owner of one of these actions.:D:D

    Paul
     
  5. swd

    swd Gold $$ Contributor

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    I've barreled 3 or 4 of them. Everything Paul has said is right on. In addition all the threads are thread milled and the barrel threads are timed so any gunsmith can breech and chamber a barrel and the lettering will line up perfect. The head space dimensions on all of them have within .001". So far they seem very consistent and very well machined. They have a small amount of cock on close like a 700. With the dual cocking cams they open very smooth.
    If your going to run a short 6BR length the extractor and ejector need to be tuned and a some chamfering on the front of the lug recess in the action. In general the extractors can use a little de bur and polishing to work a little smoother. This is a minor 10-15 minutes of work.

    I wish they would release a version solid bottom single shot with a small pin.

    If your building a new rifle don't waste your time on a 700. With the purchase price of a 700 plus replacing the bolt and all the associated work it will cost a lot more and still not have all the features the Gunwerks has.

    If Gunwerks can keep the price in the $750-$850 range they're going to sell a boat load of them!
     
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  6. OLEJOE

    OLEJOE

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    Yeah I thought the same thing you said about the 700. The Borden bumps on the bolt is really what peaked my interest. Was also wondering what the firing pin dia. was. I’ve got a 700P I thought of doing a build with but it is so accurate I just can’t bring myself to do it. I had to have the bolt face reworked with the small pin added and a CE trigger. I would rather have a different caliber but the 308 shoots great. Anyway, I’m still looking to use a GRB. Thanks for the info and the reply.
     
  7. swd

    swd Gold $$ Contributor

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    They're .070" if I recall. One I built in 6BRX was having pressure issues around the pin. He sent it to Greg Tannel to get bushed and just got it back. Also Paul at boltfluting.com is now fluting GRB bolts. Paul is a great guy and a site contributor.
     
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  8. OLEJOE

    OLEJOE

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    Thanks for the heads up. Greg Tannel is who fixed the bolt in my 700. No more cratering.
     
  9. IdahoCTD

    IdahoCTD Silver $$ Contributor

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    I've used one on a 300wm build with a Christensen CF barrel. For the money they are a great action. The 2 things I don't care for are the excessive chamfer on the front of the action and the tri-lock recoil lug. The excessive chamfer shows up in the bedding. The reason I'm not fond of the tri-lock recoil lug set up is you can't check the action face trueness without cutting the lugs off and the lower lug cut of the tri-lock is cut below the level of the action requiring filling to not fill with bedding compound. Anyone that knows mills knows it's hard to go on and off of material with a tapered end mill and have a truly flat surface. You can see where the edges of the end mill cuts the material lower than the rest near the lugs of the tri-lock. I'd rather see a pinned recoil lug and a spiral milled action face. I think the tri-lock thing was something to try and set them apart from the others but there is no real advantage to it and plenty of disadvantages to it. I'm not particularly fond of 18tpi threads but that is just a personal preference. If I'm really nit picking I think their bolt knob is rather fugly and they should of used a standard pattern for bases. I've also measured the firing pins at .070" and the hole in the bolt pin gauged at .075" which is rather sloppy for a custom action and will typically result in primer cratering.

    I have a couple more for other builds so I might cut the tri-lock lugs off one to see/show the difference in the end mill cuts and run a normal lug.

    BTW the 300wm shot a 2.25" group at 790yds with the 9th through 11th shots through the barrel.
     
  10. OLEJOE

    OLEJOE

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    Thanks. Your experience and comments is exactly what I’ve been looking for. I still haven’t made up my mind on what I want to do. I’m still researching and looking. Thanks again
     
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