Some pics as promised.... please see the attachments.
The stock etc is still not finished yet, only to show you the shape/configuration.
The "dummy" action & barrel is only for scale/proportion.
The concept is a budget barrel change rifle, in 6ppc & 284win.
The action is a Stolle Panda RBRP-RE with ".308" bolt face. The PPC barrel is 21.5" long. The .284win barrel is approx 30" long. The 'main" rifle is the PPC, but I would also try the 1,000 yds and F-class in the next future. This gun is designed for LV class with the PPC, and LG class with the .284.
I hope this gun can/will shoot as expected!
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The stock... As a man who loves experiment (and unfortunately poor, lol), I need to make the stock (etc) myself. I was thinking to make two different stocks before but I changed my mind. After some contemplating with the designs & inputs from some friends in this forum, I decided to make one stock only - "that suits all". (It sounds too ambitious, ain't it!? I would say YES too! lol.;D).
First thing is, the stock must be rigid/solid & long enough, but still make weight in "LV mode" 10.5 lbs. Secondly, it must be able to be used for prone/F-class shooting also (and comfort, still). Lastly, it must be a low rider & must have weight system.
From my past experience on my 'Swallowtail' stock, I know I need a more longer & stronger stock. I keep the butt at 3 inches wide, because I feel it gave me more stable setup and rides on the bag very well. What I need is a little improvement such as a more simpler shape & approach. (I don't want to spend too much time now!). But basically it will resemble my previous swallowtail stock, just more simple.
I have maximum 870 grams for the stock, in "LV mode" 10.5 lbs. (this assuming I use a Sightron 36x).
I have maximum 2,000 grams for the stock + weight/attachments, in "LG mode" 17 lbs. (with same scope).
The action is decided to be glued-in + two extra screws (rear & front).
I chose to use carbon fiber + epoxy resin for the outer shell and again light wood inside. It's a simple decision anyway, and I also find that working with carbon fiber is much more pleasant compared to itchy & stiff fiber glass. Personally I feel wood & carbon fiber (wrap around) combination will give rigidity advantage and it feels "solid" too. (no "ringing feel" when you knock the stock, so vibration dampening ability should be good).
However, being idiot and live in low-tech in Indonesia (lol), I did the work - perhaps just like what you guys in progressive countries did to make a stock several thousand years ago in "stone-age" era...(well, maybe, lol). I hand laid the carbon fiber and didn't use vacuum press, etc. I don't even know how to use a vacuum press nor do know how it work! This is the first time I work with carbon fiber. I still have some rough spots "here & there". (Next time I must be much better, anyway).
However, the stock & "the attachments" are straight & parallel (within 0.015" or so). I use a milling machine to make/shape the out lines.
The stock is approximately 35" long, already fine sanded & ready for some airbrush work. It's now about 840 grams and will weight approx. 860 grams or so, finished.
Yes it is rigid, feels "solid", balance "right" also. It will be pretty when finished, too.
The rear butt of the stock has a large convex for more comfort recoil. It allows my shoulder to square on it.
The stock has built-in female threads inside (in front & rear) to accept "the attachments".
The "front/foreend attachment" is made from wood + fiber. It's 10" long by 8" wide for extra lateral support. Weight approx. 350 grams. It's for the Flyshoot & the 1,000yds BR. I don't think it's usable/allowed for F-class.
The "rear/butt attachment" is made from alum 7000 series, weight approx. 800 grams. It gives weight on the rear, also to make a more straighter toe angle (to be approx. 3.5 degrees from horizontal line) for the Fly/1,000yds/F-class, and a larger surface to accept the recoil of the .284, in the same time. The stock is not designed to accept rubber recoil pad. It follows the shape of the rear stock (convex), with catamaran hull shape, and is secured to the bottom of the buttstock by three screws. I can add more weight inside the rear attachment (or make a another one from solid S/S block), say for HG class. But later on this.
The stock, without the fore end & butt attachment, must be fine for the LV/HV short range. (I have no doubt on this). The bottom of the fore arm & butt stock is flat, and the "toe angle" is just correct (will intersect the center line of bore at 17"-18" in front of the bolt face). The bottom of the buttstock is made flat (not catamaran) to prevent breaking the short range BR stock rules.
I'll probably add a weight on the bottom of the buttstock for HV class, say from 1/2" thick S/S plate, still maintain the allowed toe angle.
Yes it will need special rear bag, I've done it before this with good result.
With the foreend attachment, the stock will extend up to 39" long. It is slipped & interlocking into the foreend, and is secured by two screws from the bottom. (the screw holes on the bottom of the foreend wouldn't interfere with front bag in "LV/HV mode"). I intentionally make it symmetry (not offset) as it is already quite stable at 8" wide. The bore of the barrel will be about 1 7/8" from the bottom of the front wing. I guess/hope it would minimize the torque effect of the .284.
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Your thought???
Best,
seb.
