A different method of mounting Rail Gun barreled action.

[BillBrawand]

with all the bbls i put on rim and cf i just put piece of flashing on top and bottomof bbls in block seems to work quite well

have used allen wrench with 9 16socket end as tight i could evenly also used tork to 50 as smiley adv both seemed same on groups

 

[BillBrawand]

with all the bbls i put on rim and cf i just put piece of flashing on top and bottomof bbls in block seems to work quite well

reason for to keep direct presure off the barrel then final tune

 

[BillBrawand]

here is another way that it was done.

The action has been pressed into the block.
The disadvantage is that it requires a dedicated action because it's not coming out.

The barrel is free floating up to the the action shoulder making it more tuner friendly than the regular v block design.

yrs ago bob adamoviz heated alum set xpioo rem. In really great any barrel seem to shoot well

 

[Centerfire]

Just a thought

While laying in bed the other night, I was thinking about the various methods of mounting a Barreled Action to the top of a Rail Gun Top. Barrel Blocks are the most successful it seems. And they work once you arrive at the proper tension of the clamping screws.

For some reason, recoil lugs popped up in my head. I see thick ones on big rifles, so what if you incorporated a stress free way to mount the barreled action with a precision machined mounting block that was in reality a huge recoil lug.

This is what I came up with. The block is machined from 17-4 PH at H 1050. It was bored and faced on the same setup to insure it is dead square. The barrel is machined to match it. The fits have .001 clearance in the bores of the block.

The block is secured with two 3/8 24 bolts

I’m going to try this,.....just because.

http://benchrest.com/attachment.php?attachmentid=23693&stc=1&d=1592528120

http://benchrest.com/attachment.php?attachmentid=23694&stc=1&d=1592528163

http://benchrest.com/attachment.php?attachmentid=23695&stc=1&d=1592528226

http://benchrest.com/attachment.php?attachmentid=23696&stc=1&d=1592528279

http://benchrest.com/attachment.php?attachmentid=23697&stc=1&d=1592528380

I was wondering if Meehinite would be useful to you instead of the 17-4 PH at H1050?
www.stlprecision.com
Centerfire

 

[jackie schmidt]

Well, I made to Tomball today with two friends Ed Bernabeo and Dan Blair. They seemed as anxious to see how this thing was going to shoot as I.

We had a beautiful morning, sunny with 6 to 10 mph winds. Shooting over a 4 flag set.

I must say, when I found the right combo, this thing really shot great. I’ts been a while since I have sat down and shot some really small groups with my Rail.

The load was 30.3 grns of 133 behind a Bart’s 66 grn BT, .015 jump. I have had these bullets for over five years, about 4000 of them. They have always shot pretty good.

Here are the three best 5 shot groups I Shot. After I got the tune right, all of the groups were good, but the wind got me on a couple, turning small “ones” into “small twos”. I don’t have a official measuring device, but even Stevie Wonder can see the Rifle is working.

In short, my “humongous recoil lug barrel/action mount” seems to be a very viable system. The Rail Gun shot as good as it ever has.

http://benchrest.com/attachment.php?attachmentid=23727&stc=1&d=1592786175

http://benchrest.com/attachment.php?attachmentid=23728&stc=1&d=1592786272

http://benchrest.com/attachment.php?attachmentid=23729&stc=1&d=1592786333


To make the day even better, early this morning At about 6:30 heading down Zion St too the range, I passed a Box Turtle in the middle of the road. I immediately stopped, picked him up, and after I got to the Range, released him in the woods. I sat I’m down, and in a couple of minutes, he was gone.

http://benchrest.com/attachment.php?attachmentid=23730&stc=1&d=1592787205

http://benchrest.com/attachment.php?attachmentid=23731&stc=1&d=1592787262

Saving a Box Turtle from getting run over, and shooting small groups. That’s a pretty darned good day.

 

[geo.ulrich]

Good to see you tried I have zero complaints with mine and i think you will find it's less finicky than torquing....

 

[Joel]

In the late 90's or early 2000's Robert Chombart of RPA action fame was experimenting with a flexible bedding compound in lieu of glass bedding for bedding the action. I don't remember if it was Mr. Chombart himself or someone else on one of the threads was trying the flexible bedding in a barrel block. They used a recoil shoulder and a rubberized bedding compound. Never heard how the barrel block worked out but Mr. Chombart at the time was claiming excellent results with flexible bedding in place of standard glass bedding.

About the same time a friend wanted to use an Anschhutz aluminum stock for NRA long range and Palma. This was before al the chassis stock we have today He wanted three different barrel actions combinations to quick change into the one stock without POI change. I did a much slimmed down version of what you did. The barrel had a small recoil shoulder turned on it and it was glued into the barrel block with 680 Loctite. It met or exceeded expectation but the accuracy requirement between rail guns and Palma rifles are vastly different since Palma is mostly won or lost by wind reading ability.

 

[OliveOil]

Jackie,

Nice shooting. Thanks for saving the turtle.


Joel,

Thanks for the info about Chombart soft bedding trial.


Olive.

 

[Dave Tooley]

Here is another way that it was done.

The action has been pressed into the block.
The disadvantage is that it requires a dedicated action because it's not coming out.

The barrel is free floating up to the the action shoulder making it more tuner friendly than the regular V block design.

I think I recognize that rifle.
When I first started shooting BR in 1978 there were, what I call, front sleeved actions. Nick Young had two rail guns and one HV. One was an under slung block and the other had a nicely made sleeve on the top. I still have that one. I built several for people where I glued in the front receiver ring into a block with steel epoxy. All shot fine. No screws and easy to change barrels. No surprises or learning curve.

 

[WSnyder]

In the late 90's or early 2000's Robert Chombart of RPA action fame was experimenting with a flexible bedding compound in lieu of glass bedding for bedding the action. I don't remember if it was Mr. Chombart himself or someone else on one of the threads was trying the flexible bedding in a barrel block. They used a recoil shoulder and a rubberized bedding compound. Never heard how the barrel block worked out but Mr. Chombart at the time was claiming excellent results with flexible bedding in place of standard glass bedding.

That was the Barnard Flexibloc or Flexibed made by HHE bedding block. It seemed to be around until 2010 ish give or take. Seemed to disappear altogether. Maybe it went away when HHE quit making the Millennium actions.

Someone had a fairly short light sleeve bedding block available that was sandwiched between the barrel and action as in Jackie's and George's design but it was intended for a traditional stock. Can't seem to find it anywhere right now.

 

[Joel]

That was the Barnard Flexibloc or Flexibed made by HHE bedding block. It seemed to be around until 2010 ish give or take. Seemed to disappear altogether. Maybe it went away when HHE quit making the Millennium actions.

Someone had a fairly short light sleeve bedding block available that was sandwiched between the barrel and action as in Jackie's and George's design but it was intended for a traditional stock. Can't seem to find it anywhere right now.

Kind of figured the it went the way of the Dodo bird. When RC first started writing about it I followed it somewhat but never tried it. I didn't know HHE was doing it commercially. Thanks of the info.

some more info below

http://benchrest.com/showthread.php?85043-Rubber-Bedding

http://forum.accurateshooter.com/threads/barnard-bedding-block.3740170/

https://c-g-designs.blog4ever.com/en-flexibloc-illustration

https://www.truefliteriflebarrels.co.nz/About/Target-stocks.asp

http://www.rimfireaccuracy.com/Forums/showthread.php/329-Kill-the-Vibrations/page3

 

[jackie schmidt]

Kind of figured the it went the way of the Dodo bird. When RC first started writing about it I followed it somewhat but never tried it. I didn't know HHE was doing it commercially. Thanks of the info.

some more info below

http://benchrest.com/showthread.php?85043-Rubber-Bedding

http://forum.accurateshooter.com/threads/barnard-bedding-block.3740170/

https://c-g-designs.blog4ever.com/en-flexibloc-illustration

https://www.truefliteriflebarrels.co.nz/About/Target-stocks.asp

http://www.rimfireaccuracy.com/Forums/showthread.php/329-Kill-the-Vibrations/page3

Joel, my friend Ed Bernabeo has a barrel block rifle in 6.5x55 Ackley. While it is built like a Benchrest Rifle, he uses it mainly for prairie dog shooting.

We were discussing how he could do away with the barrel block, and incorporate a mounting block like on my Rail in the stock in it’s place.

It could either be bedded and bolted in, or permanently glued in.

Just another project.

 

[Al Nyhus]

I built several for people where I glued in the front receiver ring into a block with steel epoxy. All shot fine. No screws and easy to change barrels. No surprises or learning curve.

Dave, that's a concept I've thought about trying. On yours...was the block only as long as the front section of the receiver? Was the block glued or pillar bedded to the stock? Did the block incorporate any sort of recoil lug to the stock?

Thanks! -Al

 

[Dave Tooley]

Al
The UL rifle I have now has a block maybe 8"+ long. I can mount a 2" Unertl on it so it might be 10". I'll get a pic up today. If I remember correctly the HV had a round aluminum sleeve about 6-7" long. No recoil lug. The sleeve was bedded and was used as the recoil lug. There were scope mounting issues with that setup. The actions, XP100's w Beason bolts, were mounted on a mandrel and an area on the front turned/trued to fit a bored hole in the block. The block was counter bored from the front for barrel clearance with the face of the action extending far enough to clear the block to allow barrel changes. I think I can put an 1.450" on this rifle.
When I built them guys didn't want to sacrifice an action by turning it down. I would epoxy a SS bushing on the front receiver ring. I would turn it down leaving a small shoulder on the rear for alignment/stop in the block. When I installed it and I would leave it over night with the action and block vertical. No stress. I've seen large diameter stock used with just a flat machined for mounting.
I seem to remember a Panda that had this treatment done to it in an UL rifle. I know several Hall actions were used. One a full length sleeve then the front ring installed in a block.

 

[Dave Tooley]

It's 2 1/4" X 12" All ground

 

[jackie schmidt]

It's 2 1/4" X 12" All ground

View attachment 23742View attachment 23743

Dave, one of the best shooting Rails I ever saw was back in the early 2000’s. Speedy had bought a discarded Unlimited barrel from a top shooter that was not supposed to be much good.

He rechambered it, and mounted it in a old Kelbly Polar Action. The action was simply bolted to the Rail Gun top.

That thing shot phenomenal. It always stuck in my mind how simple it was.

 

[glp]

Polar Action

I always admired pictures of this action but wasn't prepared for how big it actually is until I saw one laying on a bench in Gary Long's shop in Millville PA years ago. I asked Gary about it and he told me that someone had brought it in for repair. Seems the owner cut the front section of the bolt containing the recoil lugs off and tried to fit a Savage floating bolt head to it to improve its accuracy...really true.

I made an offer for the action and had a new bolt made for it by Kelblys. Finding a stock to accommodate the width has and length of the action been a bit of a chore. It's at Tom Meredith's now as he had a leftover stock that he says will fit. I've already had the barrel fitted to the action...a hunter weight in order to get things within the 13.5 IBS weight limit. It's probably going to look a bit funny but hey, its mine and I just think the Polar is a great looking oddity of the past. --Greg

 

[Dave Tooley]

Dave, one of the best shooting Rails I ever saw was back in the early 2000’s. Speedy had bought a discarded Unlimited barrel from a top shooter that was not supposed to be much good.

He rechambered it, and mounted it in a old Kelbly Polar Action. The action was simply bolted to the Rail Gun top.

That thing shot phenomenal. It always stuck in my mind how simple it was.

I remember seeing a rail with a Polar sitting on top. Nick also had one built with an under slung block. I'm thinking the block was 6-7" long with a single V guide. I liked shooting that one more than the one I have now. Probably because of the convenience of everything being lower.