PT&G Bolt Dimensions

[PaperPuncher]

I promise I tried the search function as I can be most certain this has been asked and answered, however I had no luck...

So, I am picking up a virgin, stripped, Remington 700 long action today as the 1st part of a semi-custom build in .300WM.

Going to order a PT&G bolt however I need to supply a bolt diameter.

Question: How does one measure the id of the action? Is there a proper way for the hobbyist to do this? I have a mill with a DRO (plenty of other measuring devices but none that seem to be the exact right tool for the job) if that makes it any more feasible. Just want to measure twice and cut once to avoid the whole "I keep reaming this receiver but your bolt is still too small" thing.

Any advice on best practices for this measurement? Even if it is "take it to a professional".

Thanks in advance.

[CaliDoc]

Pm Randall on here. His sn is ar15barrels. He will tell you what you need.

[LynnJr]

Most shooters have there action reamed to 0.705 and then spec the bolt for the desired clearance.
I spec mine at 0.704 but some like more clearance.
If your not going to have the action reamed I would go 0.700 or 0.701 just to be safe.
In the old days gunsmiths would epoxy half round bushings onto a factory bolt to take up the clearances.
The picture is a PT&G bolt at 0.704 inches.
Don't forget you want the 0.062 firing pin and you want the tighter fitting Lawton shroud when ordering. Also they make a longer bolt handle which in my opinion is a must. They only make the longer handle in a straight bolt but I prefer that as well.
You also need the 0.062 firing pin assembly and the extractor kit.

[ar15barrels]

Question: How does one measure the id of the action?

I use gauge pins.
There is really not many good places where you can use a bore micrometer because of the lug raceways and the fact that there is very few areas in the receiver where a full circle of the bore even appears.
If you are going to true the receiver, then the receiver bore should be opened up to 0.705" as part of the truing job.
Then you would want a bolt around 0.702" or 0.703" depending on your final finish that you plan to apply.

[LynnJr]

Here is a picture of a factory bolt that has been double sleeved.

[milotrain]

This is a take on the "borden bump" version of double sleeving. Obviously there are easier ways to skin the cat.

[JMP]

I like the 0.704" bolts with 11 degree sweep and a parkerized finish. I've found that the parkerized or equivalent finish makes the cycling faster and cleaner.

Just get the non-fluted, non-jewelled bolt. The flutes and jeweling that come out of PTG are left a bit sharp. The rough edge can catch the next brass case in your magazine. I have found that the straight bolts have your best chance of a super smooth R700. The only reason to ever put flutes on your rifle is to make it weigh less and this is generally for match rifles where they need to make a given weight.

[diver160651]

PT&G Bolt Dimensions

I like fluted bolts because they look nice (to me). AI puts them in to give sand a place to go and still operate the bolt. Unfortunately, the flutes that could let sand/dirt out also let it in..

I don't see a reason for them other than looks, but I have a bunch with them



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[PaperPuncher]

Thank you everyone for the responses and advice. I really appreciate the help. Hope to see some of you at one of the 2000+ yard matches once I can get this all pieced together.

[LynnJr]

We hold monthly matches and everyone is welcome to shoot with us.
In NorCal we take September off due to deer season so we don't ruin anyone's hunt.