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Bolt Bushing.

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Bolt Bushing.

Postby Grimstod » Sun Oct 08, 2017 4:06 am

So I got pretty tired of all the cratered primers I was getting in Smyert 2 and three so I decided to give bolt busing a try. Its actually very easy. I have now done two of my mosins. Soon I will do more of them.
I have done a bunch of them now for other people to. A lot of Savage guys have been having me do theirs.

This is before. The Firing pin hole was gigantic. The pin in the bolt face is .100!
20989201_721293261388762_4405097863805998125_o.jpg


Centering up the bolt head in the chuck. This is a lot of trial and error. Fortunately am only touching those parts of the bolt face that only support the primer. If I was reheadspacing the rifle I would just true up the lugs and face but as you all know chaining headspacing on a mosin is not easy. lol Still I like to get it as close as possible because I am OCD.
20989201_721293261388762_4405097863805998125_o.jpg




Here is the bolt face reamed out for the bushing.
21105600_721293264722095_3950852798409351409_n.jpg


Finished product has a much smaller firing pin hole. Almost 50% smaller. You can see the results on the primers. Brass primer is before and nickel plated primer is after.
20992563_721293158055439_7427561526489308238_n.jpg

20989201_721293261388762_4405097863805998125_o.jpg
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Re: Bolt Bushing.

Postby Marauder 1 » Mon Nov 27, 2017 10:05 am

Nice job, what are you using to bond the bushing into the bolt face?
Thanks
Mark
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Re: Bolt Bushing.

Postby Marauder 1 » Mon Nov 27, 2017 10:10 am

BTW a 4 jaw independent chuck might make it easier to center since you can adjust it a little better than a 3 jaw. That's my next purchase for my lathe.
Seeya
Mark
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Re: Bolt Bushing.

Postby Grimstod » Mon Nov 27, 2017 6:17 pm

Marauder 1 wrote:Nice job, what are you using to bond the bushing into the bolt face?
Thanks
Mark

The bushing is oversized by .002. One time I accidentally made on .001 oversized and I had the hardest time getting it back out. At .002 its never coming out. Also there is a step inside the bolt that I leave so its supported agains blush thrust from the primer during ignition. Did one for a friend and he has put 1300 rounds on it and it has not moved so much as a .0001th.

Yes I do have a four jaw. I would use it if it was way out of round.
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Re: Bolt Bushing.

Postby Grimstod Desh » Tue Nov 28, 2017 10:29 am

Did Someone try to PM me? My other account is not working at the moment.
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Re: Bolt Bushing.

Postby Grindl » Mon Apr 02, 2018 8:59 am

I began having issues with my competition rifle doing weird things . Hang-fires , Non-fire after pulling the trigger and the gun not firing , but the primer dented . And worst of all , it was starting to effect my scoring negatively at a rapid rate .

I contacted Grimstod and sent him my bolt and a extra firing pin to match up , so I'd have a back-up . Turn around time was about six days total and I've seen a great improvement in overall performance since the bolt was re-bushed and the F/P turned down .
And like most "F" shooters , I track my scores , and percentages very closely . Since having the bolt done ,on average , I've dropped from three "8's , to one , and my 9's count has also dropped three or four a string . That means I've gained four to six points a string of twenty shots , and over-all my scores have gone up from low 180's to mid 190's . And makes this M-N competitive .

So if you're having firing issues , cratered primers , hang-fires or any of those gremlins and you think the bolt is the problem . Contact Grimstod ....I have been very pleased with the job he did on my bolt / Firing Pin-(s) , and I highly recommend his work . And by way of qualifying my recommendation to any of you guys , I'm a retired master tool & die builder , so I think I can tell good work when I see it . And Grim does good work . :thumbup: :thumbup: :thumbup: :thumbup:
If not me.....Who ?
If not now ....When ?
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Re: Bolt Bushing.

Postby Grimstod Desh » Tue Apr 03, 2018 5:46 pm

Thanks for the Great review Grindl!! May I put it on my website?
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Re: Bolt Bushing.

Postby Marauder 1 » Thu May 03, 2018 1:30 pm

Hey Grim:
I'm starting a new project rifle based on an M-38 that I just got the barreled action for. I have no bolt for it so I'm putting one together from parts. Once I get it head spaced how much do you charge to do this? do you need just the bolt face or the entire bolt. I'm probably going to have Max Shepard do the custom handle for me again.

Also did I ever send you one of my custom springs?

Thanks
Mark
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Re: Bolt Bushing.

Postby Grimstod Desh » Fri May 04, 2018 1:27 am

Hay mark I would send the bolt before you get it head spaced because then I can turn up the bolt for you. I don't think you ever did send me one. But I have bushed a few bolts for other people that had them in them. Almost everyone who has had their bolt bushed by me has had stelar performance. One fella I did it for recently said he was able to gain 300fps. His SD drop considerably and its shoot fantastic now. There is a report on it here. https://grimstoddesh.wordpress.com/2018 ... educes-sd/
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Re: Bolt Bushing.

Postby Grimstod Desh » Fri May 04, 2018 1:28 am

I have prices listed on my website. 49.99 a bolt and 8.49 shipping.
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