Author Topic: My target rifle project (Read 9441 times))

bhh · « **Reply #20 on:** July 09, 2017, 08:29:24 PM »

Wow! Amazing work.
I vote for blue.

Finn · « **Reply #21 on:** July 11, 2017, 03:22:21 PM »

Had some range time today. As usual I looked outside and weather was superb, but the minute I arrived at the range it started to rain and wind picked up.
Only shot two paper targets, after couple of minutes into shooting rain was getting too heavy for those so I switched to steel plates. I only had four 40 mm dia. steel plates to shoot, so lots of running back and forth in the rain. Plates went down with ease, and the two 5 shot groups I managed to shoot were 33mm (1.3in) and 27mm (1.064in). I used 8.2 grn. RWS meisterkugeln and range was 40 meters (43.7yds), sandbag rest and diopter sight. What I really need now is better weather and better long range pellets to really test if the gun needs to be modified somehow. I'm guessing H&N FTs or the usual JSB exacts will improve things.

Finn · « **Reply #22 on:** July 17, 2017, 03:06:11 PM »

Lets continue the story, I've had good and bad luck. Sunday evening I started machining rear sight parts and everything was going well and just when I least expected the worst thing happened, and my trusty mini mill decided it was time to shred the plastic primary gear into million pieces.
I was furious, mainly because I had forgotten to take out the spindle locking bar before twisting the volume knob, and therefore had no one to blame.
Today I called the place where I bought the mill and sure enough the guy said that the gears are not stock item but available from manufacturer. Funny how I didn't ask what the exact price was. Anyway I was sure that it can't be very expensive and he ordered it for me. Later he called me again for shipping details and then it popped in my mind "ask the price", and when he told me it was going to be somewhere around 80 euros I almost choked.
I told him that it was a robbery at best and order was cancelled, the lucky part was that while surfing interwebz for o rings, I found a place where same size machined steel gear was 17 euros so thats what I'm waiting now to arrive.

I also did some pellet testing and had no luck with crosman products. Has anyone had good experiences with 7 grain crosman domed or crosman destroyer pellets in .177, like less than inch 5 shot groups from 45 yds?

I was surprised to see that RWS wadcutters did a better job than domed pellets at longer ranges, I guess it comes down to quality control.
Destroyers were apalling, even from 10 meters away there was no grouping, might be even worse without choke.
JSB Exacts arrived today but it's pouring rain so no testing.

Rob M · « **Reply #23 on:** July 17, 2017, 04:21:52 PM »

same mill arrangement I have , but the gears are readily available in the US for 5-20 dollars , depending which one and whether you need steel or plastic.. Bummer.Glad you eventually found one .. I haven't thrashed the gears on mine yet, but one day I'm sure I will.

Finn · « **Reply #24 on:** July 17, 2017, 04:32:59 PM »

Surely that gear was doomed from the day it was made, pom gears are not good enough for machine tools, on the other hand it acted as a fuse and might have saved the main gearbox from destruction. I still doubt that the small motor would have enough torque to break steel gears even without fuse parts.

I'm going to convert it to belt drive soon, but first it needs to be in running condition so I can make the required parts (or set of gears). I hope that the other gears are in good enough condition to mill the parts for belt mod. I'm also making a new hydro test equipment, I'll need that before the ebay compressor arrives.

Rob M · « **Reply #25 on:** July 17, 2017, 04:44:24 PM »

MAKES sense .. its like when I'm making something for my lathe , forget I need the dam lathe to make it , and already have the lathe half apart lol

Finn · « **Reply #26 on:** July 20, 2017, 10:10:16 AM »

Finally the gear has arrived, it's sturdy enough that I can slice it with a hacksaw and have two gears for the price of one. It doesn't have a keyway that was shown in the product picture, but thats easily done in a lathe.

Finn · « **Reply #27 on:** July 23, 2017, 11:52:28 AM »

Got the mill working again and I must say that steel gears make some proper noise. Also had time to make a new tube endpiece with pressure gauge. Range testing revealed nothing new, best five shot groups were 23 mm from 50 meters with diopter sights, JSB exact 4.52 works well with this gun.
The velocity has to be in certain range between 195-200 m/s or the accuracy starts to suffer. What might be causing this? I have the regulator set close to 85 bar and indeed there is noticeable muzzle flip (recoil absorber mass removed), but it gets stronger below 85 bars. I think I need lighter hammer, it's 18,5 grams now.

MJP · « **Reply #28 on:** July 24, 2017, 01:08:24 AM »

Ok now I'm officially impressed!
That is one sweet looking rifle.
I'm usually in too much hurry to make something pretty, and sometimes I can make something half pretty.

Dryfire system and all, like the big name competition guns, nice.

Marko

TF89 · « **Reply #29 on:** July 26, 2017, 10:21:33 AM »

Incredible, seriously incredible. Main color Blue with red and gold highlights.

Finn · « **Reply #30 on:** July 26, 2017, 02:33:00 PM »

Thanks for everyone, this has not been the easiest project but hopefully I can finish this sooner or later.

I've been busy making other parts for compressor and today I bought my first scuba tank and need some parts for it as well. Tank will help a lot when testing shot strings and power settings, requires a lot of shooting.

Finn · « **Reply #31 on:** July 31, 2017, 10:12:24 AM »

My fill station project is finished, it has only basic functions but so far it has worked very well. Blue knob is bleed valve and red knob adjusts the fill speed.

Rob M · « **Reply #32 on:** July 31, 2017, 11:32:46 AM »

very nicely done !

TF89 · « **Reply #33 on:** July 31, 2017, 09:16:31 PM »

You have mad skills. Amazing.

OP · « **Reply #34 on:** August 01, 2017, 04:33:54 AM »

I see by the posts several of you members live in Finland (Suomi). If you feel like it, please PM me your specific locations. Having lived there for 8 years, there might be some useful info to share. Thanks.

lillysdad621 · « **Reply #35 on:** August 01, 2017, 09:10:44 AM »

im am truly impressed with your talent. that is a fantastic rifle!

Finn · « **Reply #36 on:** August 01, 2017, 02:42:22 PM »

Anodizing has begun, shroud is in the acid tank, I'm nervous and anxious to see how it turns out. I have only one long and narrow container so it has to be used for cleaning and dyeing and washed carefully between each step. It's now 20 minutes to disaster or success, and it is time to heat the dye and make a mess of my kitchen.

MJP · « **Reply #37 on:** August 01, 2017, 03:49:49 PM »

I have a solution for you, very cheap. Parvekelaatikot! And for you english people, long balcony flower box in plastic.

Marko

Finn · « **Reply #38 on:** August 01, 2017, 05:14:28 PM »

Those could be useful although I don't think you could boil parts in them. This time I wanted really electric blue so I used salvaged HP printer ink and I only have half a liter of it so the boiling pot had to be the exact size. Maybe I'll do as many parts as possible tonight, it is going to be a long night for sure. I try to post some pictures of progress when parts are in electrolysis.

MJP · « **Reply #39 on:** August 01, 2017, 05:47:53 PM »

I use them as electrolysis tank and for dye, the dye only needs 45-55c and those boxes can take that easy.
Gaterosplating dyes work nice and are not too expensive.
Marko

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My target rifle project

Author Topic: My target rifle project (Read 9441 times))