Thread: The lightening project

Originally Posted by Friwi

I would be very hesitant to shoot one with the forward part of the action that has been milled over the threaded portion of the barrel tenon.
The Howa looks neat

Only 0.5mm deep there. But I hear your concern. Very easy to remove those cuts from the program. Ill do yours like that

Originally Posted by Stocky

Attachment 249381
Attachment 249382

Similarly slabbed a Howa Mini and skeletonised, also gave the bolt shroud a serious trim and slooted bolt handle. Have modeled a Tikka and a few other actions for the CNC but haven't actually got one hahaha

Nice Chassis mate!! Ill be doing that soon and fluting the bolts.

Originally Posted by robhughes-games

I did mate.��Attachment 249390
Attachment 249391

Beautiful work Robert

Looks great, I have modelled similar cuts for a few different actions. Trouble is my mill is manual. How much weight does it save? My tikka T3 action was 476g before I took to it with a mill. I only managed to get rid of 60g.

I can carbon wrap factory barrels if your interested. Last one reduced an 18" 7mm barrel by 200g with no reduction in stiffness.

Originally Posted by SixtyTen

Looks great, I have modelled similar cuts for a few different actions. Trouble is my mill is manual. How much weight does it save? My tikka T3 action was 476g before I took to it with a mill. I only managed to get rid of 60g.

I can carbon wrap factory barrels if your interested. Last one reduced an 18" 7mm barrel by 200g with no reduction in stiffness.

Took 80grams off. With a replacement bolt handle and bolt fluting it will take off lots more.

Originally Posted by robhughes-games

Took 80grams off. With a replacement bolt handle and bolt fluting it will take off lots more.

Have you tried shooting it without a stock? Very light

Love it. I've seen an outfit in Murica start doing a similar job on tikka actions, been wondering about trying to have it done on mine... Looking forward to seeing the rest!

Originally Posted by Jt89

Love it. I've seen an outfit in Murica start doing a similar job on tikka actions, been wondering about trying to have it done on mine... Looking forward to seeing the rest!

Just send me a pm mate and can be sorted!

Could you mill the top rail into Picatinny? Than you save 50-80grams on a pic base as well as shaving off material.

Originally Posted by SPEARONZ

Could you mill the top rail into Picatinny? Than you save 50-80grams on a pic base as well as shaving off material.

Possibly, but not over the thread/tenon area. So makes it a little pointless I'd think.
I've modeled up some direct ring mounts and they are somewhere in the line of projects.

What would be good, is if you could install half rings that you make, of talleys fix on a tikka receiver, and just touch them enough with your mill so that you put a certain degree of slant angle in them. Like 20 moa for exemple.

Originally Posted by Friwi

I would be very hesitant to shoot one with the forward part of the action that has been milled over the threaded portion of the barrel tenon.
The Howa looks neat

Not a lot of risk there, the material is in tension with bolt thrust onto the receiver lug surfaces and the barrel is taking the outwards pressure component (if there was any risk the barrel would let go before the receiver - remember the failed Sako/Tikka barrel batch that happened a few years ago due to out-of-spec steel?). Having said that it would reduce the safety factor for big magnums/fat cases (this being the reason Tikka's are not recommended for the seriously overbore magnums as the tenon is quite slim) but a standard caliber would not show undue stretch I would expect. There are plenty of receivers with less holding them together - and remember the bloody great slab of steel on top for the scope base and the surface under the action to accept the lug. That was the point of my comment up above though, chamber the bugger in .338LM and see what happens haha.

Originally Posted by Friwi

What would be good, is if you could install half rings that you make, of talleys fix on a tikka receiver, and just touch them enough with your mill so that you put a certain degree of slant angle in them. Like 20 moa for exemple.

Way ahead of you mate.
Been designing them already. Getting them to look "nice" is a bit tricky, but will get there. Then heaps of variables like scope widths heights ect. About to tackle those soon

Originally Posted by Friwi

I would be very hesitant to shoot one with the forward part of the action that has been milled over the threaded portion of the barrel tenon.
The Howa looks neat

I wouldn't. Doing an analysis on hoop stress shows most rifles have a factor of safety well into 5x. A contender barrel is only 20.5mm and has 2 tig welds and 2 scope mount holes right over the chamber areas. Even looking at ar15 or ar10 barrel extensions gives an idea how much "extra" is in most actions. With careful consideration it can be done. Even with huge overpressure loads failures usually occur via barrel splitting vs actions failure. I usually use a kimber as a safe minimum dimensions and they are significantly smaller than a tikka.

Yeah some of those barrels on early AR10's (Sudanese contract) are a bit eye opening to see what you can get away with -with the added stress of full auto operation.