Author Topic: Lockdown beater  (Read 2459 times)

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Offline Baggawind

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Re: Lockdown beater
« Reply #20 on: May 17, 2020, 02:26:28 PM »
Being fed up with hand indexing the mags on my home built rifles , I decided to make an adaptor that would allow me to use the self indexing mag I bought for the rifle i,m building. It,s a 3D printed jobby for a Falcon rifle. It,s taken me a day to make the darn thing but i,ve finally got it working. All I need to do now is buy a couple more mags. 
P.S. Things are still not going my way , I went and fell down the stairs last night . Now it hurts me to breath deeply. Silly old bugger, I need putting down. :-[

Offline airgunnut

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Re: Lockdown beater
« Reply #21 on: May 17, 2020, 05:20:20 PM »
Being fed up with hand indexing the mags on my home built rifles , I decided to make an adaptor that would allow me to use the self indexing mag I bought for the rifle i,m building. It,s a 3D printed jobby for a Falcon rifle. It,s taken me a day to make the darn thing but i,ve finally got it working. All I need to do now is buy a couple more mags. 
P.S. Things are still not going my way , I went and fell down the stairs last night . Now it hurts me to breath deeply. Silly old bugger, I need putting down. :-[
the Falcon mags are crap, i had a falcon Fn19 hawk, you pressed a button and the loading probe came back, you pulled it fully back then as you pressed it back in it indexed the mag and loaded the next pellet in to the breach, there was a separate cocking leaver.  (the raptor was the full bolt system)  i wore it out in a year (yes i did put about 1/2 a million pellets through it ::)) when the indexing ramps ware (almost invisible amount) it starts shaving one side of the pellet as its loaded into the breach,(we spent 2 months trying to find out why it could put pellet after pellet through the same hole at 20m but at 25m you were about 3feet away from the spot you were aiming at) you could adjust it but its a complete nightmare, you make an adjustment then test the point of impact and shoot into some thing that wont damage the pellet to see if its shaving one side off, the amount you need to adjust it is a microscopic amount, less than 1/16th of a degree on something smaller than a 5p piece. in the long run it would be easier for you to make your own mag system.
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Offline Baggawind

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Re: Lockdown beater
« Reply #22 on: May 18, 2020, 11:47:40 AM »
The 3D printed ones seem to work quite well as they are self indexing.  I agree the old nylon mags wear out , mine are badly worn . But i,ve been fiddling with them and have got them working quite well . If it doesn,t work out i,ll just use the self indexing ones ( i,ve ordered two more ).  I also agree  that setting up the old mechanical system is a right pain in the butt.

Online Gambo

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Re: Lockdown beater
« Reply #23 on: May 18, 2020, 01:00:48 PM »
The 3D printed ones seem to work quite well as they are self indexing. 

Can you post some pics please Mel? ;)


I'm surprised you both say setting the 'Fan' that drives the Falcon mags is a pain.......I've done it about half a dozen times with no problem. ???

I've got a stack of plastic mags for my FN19RS Raptor and have very slightly chamfered the edge of the exit hole of each mag. I did that for extra loading smoothness though, and not because of accuracy issues......though it probably does help with the latter.

I've also got two metal mags for my FN12RS, those work well too, and seem a much better option than the placcy mags, so I haven't had need to modify the metal mags.

 

Offline Baggawind

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Re: Lockdown beater
« Reply #24 on: May 21, 2020, 02:14:04 PM »
Well the stock arrived yesterday , already machined out to fit the Zbroia cylinder , thanks to Dave Welham. It,s from an HW80. I,ve a little bit of fiddling to do , like fill in the cocking lever slot , make a trigger guard and move the trigger position and it will be ready to put into service against the rats, what else  ;)

Online Gambo

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Re: Lockdown beater
« Reply #25 on: May 21, 2020, 05:39:27 PM »
Oooooh exciting!! 8)

Offline Baggawind

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Re: Lockdown beater
« Reply #26 on: May 24, 2020, 12:40:20 PM »
I just have a trigger guard to either buy or make and it,s done. The big problem is, it is not that accurate . The barrel is an SMK barrel, and in the past , i,ve found them to be as good as most. But, this one seems to be a duffer. I,ve re - crowned it several times and done a lot of work on the just as important breech end. I have tried it with three different silencers and without a silencer , all to no avail. It will group reasonably well at 20 yards then throw a few shots wide or high. Bloody frustrating . It could be the reg as it is slow in shutting off. So i,ve tried taking say, ten seconds between shots but i still get flyers. Short of buying a new barrel i,ve run out of ideas. The barrel seems to be slightly oversize as most pellets are loose in the bore. Bis mags and Crosman Premiers have true 4.5 heads but even these are not working well enough . Any advice most welcome folks.

Online Gambo

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Re: Lockdown beater
« Reply #27 on: May 24, 2020, 02:25:03 PM »
I'd say deffo try another barrel Mel.......personally I've found SMK barrels to be crap....at least the earlier QB barrels were.

However, I note that all of the barrels fitted to recent springers, and especially the latest SMK branded PCP rilfles are visually very good.

Offline airgunnut

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Re: Lockdown beater
« Reply #28 on: May 24, 2020, 04:17:16 PM »
years ago you could get metric barrels as well imperial (4.5mm and 5.5mm) there is a slight difference in the size, in .22 the metric is 5.588mm and .177 is 4.4958mm. thats why there was a bit of confusion with pellets as ones that were made in the UK and USA were imperial but ones from anywhere else were metric labeled as imperial, but now all barrels and pellets are metric, to solve the size difference between metric and imperial (and to account for inconsistency's in barrels) you now get different head sizes with most pellets.
assuming the reg is ok (have you chronoed it over a string of say 50 shots?) then i would say you have somehow got hold of a new old stock barrel thats imperial, again thats assuming every thing else is ok, the other thing is the pellets, bis mags used to be notorious for been off center, roll them on a flat surface and look at the waist if it wobbles then the pellet is off balance, if not moving and spinning fast enough to gyro stabilize then it will wonder off coarse, to eliminate the pellets you will have to weigh, size and check every pellet to see if its off center.
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Offline Baggawind

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Re: Lockdown beater
« Reply #29 on: May 24, 2020, 05:14:31 PM »
The barrel is fairly recent , no more than 4 years old. I,ve built several rifles and pistols using SMK barrels and, until now , have found them to be very good. This one however has several tight spots halfway down . I have just been in the shed trying to polish those out. I won,t know what good, if any , that has done. I will test it again tomorrow. As far as the reg is concerned , I did turn it down a little and tested it on my reg tester. It was consistent but very slow in operating. Regs should work instantly but this one takes about 10 seconds to meter the air to the correct pressure. The Zbroia regs have a bad reputation . I did a shot string test , leaving a few seconds between shots and it seemed to be ok , around 8fps spread . I,m also taking 10 seconds between shots when testing for accuracy . Later on I will build my own reg and fit that.