RF reamer for sk ammo

[chris l]

Has anyone nailed down a good reamer for SK ammo yet?

[tonykharper]

Has anyone nailed down a good reamer for SK ammo yet?

Chris,

Your question is a little vague to give you a good answer.

There is nothing unique about SK .22LR ammo that would require a special reamer.

Any reamer on the chart would work. However, the action you use may work better with particular reamers.

example: A bolt action can use tight short chambers with full bullet engraving, but an auto will have problems with that type of chamber.

TKH

[Hi-NV Shooter]

Has anyone nailed down a good reamer for SK ammo yet?

There are different thoughts on what is ideal. here is one that I been using for several years with great results. go to Rimfire Accuracy and look up this thread by Kevin Nevius Team Lapua shooter

https://www.rimfireaccuracy.com/Foru...pua-use.23372/

Lee

[chris l]

Thanks Hi-NV shooter Ive been using the Nevius reamer and the depth was set for the Lapua. Since we cant get Lapua now, I have shooters wanting to build rifles for the SK ammo. These are PRS rifles which have a little different chamber setup.

[tonykharper]

Thanks Hi-NV shooter Ive been using the Nevius reamer and the depth was set for the Lapua. Since we cant get Lapua now, I have shooters wanting to build rifles for the SK ammo. These are PRS rifles which have a little different chamber setup.

Chris,

Could you describe the differences in a Lapua chamber vs an SK chamber.

The Nevius chamber you refer to I believe has a 1.5-degree lead and the depth is set for minimal bullet engraving.

I don't recall if it is a straight sided reamer or tapered.

You may know the late Bill Meyers used a chamber of this same description for shooting ELEY ammo with great success.

What exactly would one do different for a PRS rifle using SK ammo?

Not trying to put you on the spot or steal secrets but would like to learn what is the current thinking?

TKH

[Hi-NV Shooter]

Thanks Hi-NV shooter Ive been using the Nevius reamer and the depth was set for the Lapua. Since we cant get Lapua now, I have shooters wanting to build rifles for the SK ammo. These are PRS rifles which have a little different chamber setup.

I understand now I believe you use magazines to feed rounds in PRS unlike F-class

Lee

[Hi-NV Shooter]

Chris,

Could you describe the differences in a Lapua chamber vs an SK chamber.

The Nevius chamber you refer to I believe has a 1.5-degree lead and the depth is set for minimal bullet engraving.

I don't recall if it is a straight sided reamer or tapered.

You may know the late Bill Meyers used a chamber of this same description for shooting ELEY ammo with great success.

What exactly would one do different for a PRS rifle using SK ammo?

Not trying to put you on the spot or steal secrets but would like to learn what is the current thinking?

TKH

Tony, I believe the rifles are magazine fed so maybe tradition BR chambers may cause an issue.

Lee

[tim]

Is their not info out there regarding chambers for the Vudoo repeaters.
I have shot a couple of those….might be the best of both worlds. My buddy’s fed flawlessly with near BR accuracy.

[tonykharper]

Tony, I believe the rifles are magazine fed so maybe tradition BR chambers may cause an issue.

Lee

Lee, as

I think you are right. Many people use fully engraved chambers for single shot Benchrest rifles.
Since most actions do not have adequate closing cam they often have to use their thumb to push the bolt forward enough to close the bolt. That would not work well for someone running cartridges through a magazine. So a deeper chamber would be helpful.

TKH

[tonykharper]

Is their not info out there regarding chambers for the Vudoo repeaters.
I have shot a couple of those….might be the best of both worlds. My buddy’s fed flawlessly with near BR accuracy.

Tim,

I have always favored fully engraved chambers but I can’t say with any certainty that they are more accurate
than less engraving chambers.

I notice you used the words near BR accuracy. Do you think that has to do with the chamber or just the particular rifles?

TKH

[Hi-NV Shooter]

Is their not info out there regarding chambers for the Vudoo repeaters.
I have shot a couple of those….might be the best of both worlds. My buddy’s fed flawlessly with near BR accuracy.

Tim, if the barrel work was done by Vudoo they are supposed to be optimized for Lapua

Lee

[Hi-NV Shooter]

Lee, as

I think you are right. Many people use fully engraved chambers for single shot Benchrest rifles.
Since most actions do not have adequate closing cam they often have to use their thumb to push the bolt forward enough to close the bolt. That would not work well for someone running cartridges through a magazine. So a deeper chamber would be helpful.

TKH

Tony, I just remembered that some of the rifles for this type of shooting have what is called control feeding. the RimX comes to mind as you can't feed single rounds it must feed from the magazine.as the round is stripped from the mag it is captured and held by the bolt so it will go straight into the chamber not sure with this feed system a BR type chamber can be used.

Lee

[tonykharper]

Tim, if the barrel work was done by Vudoo they are supposed to be optimized for Lapua

Lee

Lee,

I've read that "optimized" for Lapua before, but I don't understand what it means.

I understand how the action can dictate how a certain chamber will work best.

But the word "Optimized" infers they are doing something different just for Lupau ammo. If they are I would like to know what it is.

This goes back to when many RFBR shooters changed from Eley to Lupau. I was one of them.

I simply bought some lots of Lapua and started shooting it out of the same rifles/chambers I had been using.

My scores improved and went back to the levels of 2014 and earlier and it was much easier to find good lots that worked in my rifles.

Then I started hearing this "Lapua" chamber thing and I wondered if I should be doing something different.

One difference between Eley and Lapua is the rim thickness.

Lapua normally has a little thicker rim. For that reason, I changed headspace from .042-.043 to .044-.045.

Then I experimented with various chamber depths, straight sided vs tapered chambers, 1.5-, 2-, and 3-degree leade angles, etc. etc.

Looking at the reamers I defy anyone to look at them and tell which angle they are. A 1.5 degree vs a 3 degree is really small and a 1.5 vs 2.0 is ridiculous. As far as I can tell it was wasted money.

Until this day I haven't found anything that improved Lapua that didn't have the same effect on other ammos.

This goes back to Chris's question asking about SK ammo and I'm asking about Lapua in general.

If someone has found the secret sauce, please share.

TKH

[tim]

Tim, if the barrel work was done by Vudoo they are supposed to be optimized for Lapua

Lee

Aware of that but here, he had the modded magazine and we shot mostly ELEY.

[tim]

Tim,

I have always favored fully engraved chambers but I can’t say with any certainty that they are more accurate
than less engraving chambers.

I notice you used the words near BR accuracy. Do you think that has to do with the chamber or just the particular rifles?

TKH

Well, like you, I would tend to credit most of it to a nice barrel.
My primary point was that it fed without issue from the magazine.
Did not shoot full cards, but this was a rig in a hunter type stock and running through 15 consecutive IR 50 bulls with no sighters between I got 12 X’s and one hard 9 on a good morning.
Pretty good for what that was, shooting ammo I sold him, so not my best.