IOF .22 LR rifle

[p_sircar]

Dear Mack The Knife,
Thanks for the Pics.
I was thinking of fitting a scope to the .315 using a contraption, advertised by http://www.gunaccessory.com/accessories/
Though I have not seen it, it will definitely warant a stock modification. I was reluctant to do any modification,as I will sell it as soon as I can get a decnt 30-06.(indigeneous or otherwise, at least availability of amo at reasonable price is guaranteed) now thanks to your idea, I can try it.

Thanks and regards
Prabir.

[andy_65_in]

whats the curent cost of a IOF .22 LR. are they issuing it ex Ishapore now.

[andy_65_in]

Whats the effective range of IOF .22 LR with imported ammo

[Mack The Knife]

The current cost is between 27 to 33K. If I am not mistaken you can book one at RFI.

This is not the answer you were seeking but in my opinion, the effective range is determined by the shooter's capabilities. Mine has shot a 1.25" c-t-c three shot group at a measured 118 yards from a very stable position (my bean bag) with SK standard velocity ammo. However, the rifle has seen a few modifications.

[snIPer]

Rusty,
I havent gone thru all the 13 pages on this topic to see if you have covered this but... how and where did you do the recrowning?

Barrel: Crown had a burr. Re-crowned with a 11 degree target crown........

Mack The Knife

[jaz]

what is the cost of IOF .22 LR in Punjab & what about quality

[PRITAM PATEL]

Hi All,
Last week I came back from Mozambique, My purchase limit was getting closer. I looked arround for imported guns. It turned out to be like ridiculious price demanded for creepies, and could not find my favourit 39A marlin

Finally I have bought IOF .22 rifle today. ( still looking for 39A) paid Rs. 40 K
Mod.s were done by dealer.Wood work is done and in dark finish, metal parts are blued ( it seems to me as Hot Blue ) pic.s are comming soon.

At present, action/bolt seems very rough. Safty catch is horribal.Trigger is acceptable.
I plan to put lapears 6 x 32 compact scope with standard See-through mounts.

Requesting sugg./advise for
1. how to smooth out action/bolt & safty catch
2. scope mount specification.

Overall I am satisfied with the purchase, Yet need a trip to farm to find out how well/bad it shoots.(will post results later)

Thank you All and Have Nice Day

Pritam Patel.

[Sakobav]

Pritam

Look up earlier posts by Mack The Knife where he and others have detailed the work performed on their IOF .22. Congrats and make sure you work with a competent gun smith. Generally speaking foreign made .22 ammo works better with this gun compared to IOF stuff.

Do post pictures and best of luck

[PRITAM PATEL]

Hi ngrewal,

I had gone through all pages of this topic. I belive more in "Do it your self" rather try some one's capabilities.

I am good at fixing/improving things. ( I had complately overhauled my FWB-80, new seals and piston damper). For this IOF all I need is experience of ppl who had attempted to improve theis .22.

Can any one please discribe laping procedure in detail for bolt/action.

-- Fri Jun 05, 2009 0:04 --

Res. Mack The Knife

Bolt: Very rough. Bolt rails lapped to make it smoother.

Can you plz. discribe in details, How to.....

Trigger: Excellent! Made better by replacing both hinge pins with the new pins being tighter. This is the exception as all the others I have tried have average triggers
Rifle does not cycle KF rounds due to their thicker rims. No problem with any other imported round tried to date.

Though I am satisfied with dealer's modification to trigger, but trigger can be batter, plz advise how to & what not to do.....

I did cycle 10 KF rounds before finalising the deal. They all cycled/ejected as what they were supposed to. ( guess improvement at factory )

How do I improve Safty catch mechanisam, ( at present it is too hard, I doubt it will fire a round if loaded and operated )

One more ? what is the size of dove tail scope mount base ? ( My Weaver See-through mount for .22 Cal/Airgun is not fitting properly)

Thank you and have a nice day
Pritam Patel

[cottage cheese]

Hi ngrewal,

I had gone through all pages of this topic. I belive more in "Do it your self" rather try some one's capabilities.
I am good at fixing/improving things. ( I had complately overhauled my FWB-80, new seals and piston damper)

Hi Pritam,

As far as I'm concerned that's the way to go. Best way to learn is DIY. Keep it up!

Can any one please discribe laping procedure in detail for bolt/action.

Obviously you'd need some lapping compound.
Unless the inner surface of the bolt way or bolt shaft or both are very rough...they should be ok being left alone. Do you feel the bolt movement is scratchy and rough? More likely, the 'un-smooth' feeling would be during the opening and closing of the bolt. If this is so, the issue could be more to do with the finish(and hopefully not the alignment) of the locking lugs, locking lug recess, cocking cam, cocking cam way, and up to some extent, the stiffness of the main spring.

- This is all assuming that the IOF 22 is direct copy of the Brno Mod2.

Inspect the above mentioned parts - other than the spring.

Do you notice uneven polished areas on the bearing surfaces? If so, the bearing surfaces are not interfacing perfectly. Polished/worn areas on only a portion of a bearing surface is usually an indication of poor bearing surface alignment and contact.

The least risky thing you could do for a start is apply some lapping compound on the locking lug, its corresponding recesses, the shoulder of the cocking lever(Which also in effect a large locking lug), a little on the cocking cam and cocking cam way. Cycle the bolt (Up and down- and not rearwards) several times at a time and inspect the parts in question. Ideally after several to many repeats, the polished areas would evenly cover the bearing surfaces. Don't over do it though, as it would result in a 'loose' action with serious consequences on the head spacing.

You could also try a similar lap polish of the bolt way by simply applying lapping compound on the bolts surface, inserting in the action and cycling the bolt without lock down. Don't overdo this as well and don't 'slam' the bolt either way.

As to the lapping compound, try to get hold of some good stuff. Valve grinding paste might be a little too abrasive.

Though I am satisfied with dealer's modification to trigger, but trigger can be batter, plz advise how to & what not to do.....

Surprisingly I have not as yet compared an IOF trigger assembly side by side with that of a Brno. Presumably the design(Though not the dimensions) will be the same. Like the other modification, the all the pins in the trigger assembly need to be replaced with well finished and sized ones. Additionally, the trigger actuates the sear on the upper surface by means of a roller. This roller needs to be inspected for finish, size and fit. If its rough and wobbly, it may need replacement. all bearing surfaces MAY need some very gentle stoning- Extreme care here- If the tension is satisfactory leave it be.

How do I improve Safty catch mechanisam, ( at present it is too hard, I doubt it will fire a round if loaded and operated )

Presumably the safety catch too is a direct lift of the Brno design. If so, two factors here.
1. The Brno safety design makes use of the main spring(Firing pin/striker spring) to provide the necessary tension to the safety catch. In the case of the IOF the spring may be too stiff. Sticky situation here since if you reduce too much tension on the main spring, the gun might not fire.
2. Again rough or tight bearing surfaces- In this case, there are two surfaces. The front of the safety catch is shaped to rotate into a 'half moon' slot on the bolt shroud - check to see if corresponding surfaces are rubbing- they shouldn't. The other bearing surface is in the rear of the catch. It is a small projection that is angled to slightly push rearwards, a lug on the upper tail of the firing pin. This is done against the tension of the main spring . The projection also has a small concave cut that the rounded face of the lug 'detents' into, to provide a spring tensioned 'lock' situation. Check to see if the concave is too deep or the rounded face of the lug is radiused too severely. This is usually the cause of excessive tightness. Check also that the angled surface leading to the concave detent is not too steep or rough. You may need to do some gentle and very careful filing (More of polishing) or dremel it. If you are not sure of this - let a proper gunsmith do it.

Regards,
cc

[Sakobav]

Pritam

cc has given a very detailed feedback also some of the members who own IOF .22 can chime in. You could still follow Mack The Knifes guidelines while conferring with a competent gun smith. There is one in Patiala but maybe other members could advise you about a one near you. Also check another iof .22 rifle owned by denzil from Allahabad.

Check these posts
http://www.indiansforguns.com/viewtopic.php?t=3415
http://indiansforguns.com/viewtopic.php?f=22&t=5715

http://www.gswagner.com/shoptools/shoptoolsindex.html - just an overview of the tools required

Remember legally all the modifications to the rifle have to be performed by a Gun smith.

Best

[Mack The Knife]

CC: herewith a couple of pics of the IOF .22lr trigger unit and the stripped bolt.

Ok Direct Brno Mod 2 piracy. I'm not sure about the dimensions but theoretically, a Cz452 trigger assembly should fit like a glove. I recently fitted a Basix stainless trigger(Adjustable) to a customers old Brno. It worked like a charm. Only the pins were a bit tricky as they tend not to be too tight. A bit of lok-tite would do the trick.

The stripped bolt....arrgh! A brutally crude piracy...if there ever was one. The parts all match up to a Brno Mod2...Only I'm not sure about the dimensions. Hopefully I'll be able get the two guns together for an objective comparison.

[cottage cheese]

Rusty...


err... still getting used to all these fancy buttons...I seem to have edited your post.

apologies...

[Mack The Knife]

No sweat, I have done more than my share of the same. So long as Pritam read the reply, its job done. Failing which, how good are your memory cells?

[PRITAM PATEL]

Hi,

Thank you All for replying most of my querries.

Only thing left unanswered is " Dove Tail Scope Mount spec.as my standard 11 mm, are not fitting properly"

Think Bolt has not smooth ride over the rails of action, and polishing the same and locking lugs could improve it.

Safty Catch, Shape/Finishing of engaging parts is not proper. polishing could make it right.

I live in Ahmedabad, Dont have hold of Comeptient GunSmith nearby, I am sure to do batter than only avbl gunsmith I know. ( Recomendations are welcome)

I am going out for a week, will try step by step and post results for further advises from experienced ones.

Till then Bo noite Senhors

Pritam Patel