P95Carry
Moderator Emeritus
Paco Kelly - application jig - for .22 rimfire.
Ok folks - way back I posted about the Paco Kelly ''Acu'rzr" device - a set of punches and a die/guide - to enable modification of 22 rimfire bullets. A thread in fact started by catfish over a year ago. Go look HERE. The original link to product is HERE
I played with it a bit but felt that the one potential downside was achieving consistency in use - sure it works but ..... no way to be sure each bullet formed exactly the same. Some folks asked for feedback if I went a stage further (TheFumegator for one) - and this I have now started to do (after way too long!). Let me run you thru this - which is right now very much stage #1, a starting point, after some machining today.
The prime consideration is, as mentioned, some means of achieving consistency in the reforming of the bullets - a necessity IMO. This therefore suggested to me a need for some form of jig that allows for a uniform impact on the punch - time after time.
I rumaged in the scrap boxes and selected steel, per the first illustration - which will give you some idea of what is used and approx dimensions. I doubt anything is really too critical - all this was pure convenience. Base and dropper were respectively made from a piece of mild steel - plate and a piece of bar.
I drilled out the dropper block 5/8" twice, on 2 1/2" centers and then ran a reamer thru to up the clearance a thou or so.... needing a good sliding fit. The base was drilled and tapped for 7/16" x 20 - again it was convenient - turning down the bar so as to keep a shoulder to help keep bars square to each other - important if a smooth friction-free drop to be possible. Yet to tidy up parts and polish a bit.
I center-popped the middle of base plate and set that up so I could chuck it and bore a depression - which is approx 3/16" deep and it will be fitted with a thin piece of 1/16"plywood as a safety base - the remainder of the depression taking the 1" guide/die so as to make it default to jig center. The dropper will later have a piece of leather glued to under side, to spare the brass punches - as Paco suggests using a rubber or plastic hammer for the operation - something other than steel anyways!!
The height required for an adequate result is yet to be determined. This dropper is quite heavy and may well be enough on its own - but it will be easy however if needed - to add a lead ingot atop that - by bolting it down - I'll just drill and tap the block if needed. Somewhere will be the ideal impact load - in fact - if the dropper itself is too much (unlikely) then the drop will simply be started a ways down the guide bars from a witness mark. My original experiments required quite modest taps from a rubber hammer... so hopefully this set-up will be viable... I have even considered a further modifiction, whereby I add a top restraint and impose a compression spring between that and dropper - another way of adding energy if needed.
So - this is if you like the prototype - and have yet to see if it will do the job. If needs be I'll make a further pair of guide rods and make them longer.... but I think the principle will allow for great consistency - then I can make up some test ammo and go range test it - to see if any benefits. The remaining pics are the device being assembled - the final pic shows the starting point ready for a drop, the round being ''processed'' of course would be within the guide/die piece, with appropriate punch.
I will report back later with results and mod's if needed - following which further down the line - hopefully some hard data from range testing.
Ok folks - way back I posted about the Paco Kelly ''Acu'rzr" device - a set of punches and a die/guide - to enable modification of 22 rimfire bullets. A thread in fact started by catfish over a year ago. Go look HERE. The original link to product is HERE
I played with it a bit but felt that the one potential downside was achieving consistency in use - sure it works but ..... no way to be sure each bullet formed exactly the same. Some folks asked for feedback if I went a stage further (TheFumegator for one) - and this I have now started to do (after way too long!). Let me run you thru this - which is right now very much stage #1, a starting point, after some machining today.
The prime consideration is, as mentioned, some means of achieving consistency in the reforming of the bullets - a necessity IMO. This therefore suggested to me a need for some form of jig that allows for a uniform impact on the punch - time after time.
I rumaged in the scrap boxes and selected steel, per the first illustration - which will give you some idea of what is used and approx dimensions. I doubt anything is really too critical - all this was pure convenience. Base and dropper were respectively made from a piece of mild steel - plate and a piece of bar.
I drilled out the dropper block 5/8" twice, on 2 1/2" centers and then ran a reamer thru to up the clearance a thou or so.... needing a good sliding fit. The base was drilled and tapped for 7/16" x 20 - again it was convenient - turning down the bar so as to keep a shoulder to help keep bars square to each other - important if a smooth friction-free drop to be possible. Yet to tidy up parts and polish a bit.
I center-popped the middle of base plate and set that up so I could chuck it and bore a depression - which is approx 3/16" deep and it will be fitted with a thin piece of 1/16"plywood as a safety base - the remainder of the depression taking the 1" guide/die so as to make it default to jig center. The dropper will later have a piece of leather glued to under side, to spare the brass punches - as Paco suggests using a rubber or plastic hammer for the operation - something other than steel anyways!!
The height required for an adequate result is yet to be determined. This dropper is quite heavy and may well be enough on its own - but it will be easy however if needed - to add a lead ingot atop that - by bolting it down - I'll just drill and tap the block if needed. Somewhere will be the ideal impact load - in fact - if the dropper itself is too much (unlikely) then the drop will simply be started a ways down the guide bars from a witness mark. My original experiments required quite modest taps from a rubber hammer... so hopefully this set-up will be viable... I have even considered a further modifiction, whereby I add a top restraint and impose a compression spring between that and dropper - another way of adding energy if needed.
So - this is if you like the prototype - and have yet to see if it will do the job. If needs be I'll make a further pair of guide rods and make them longer.... but I think the principle will allow for great consistency - then I can make up some test ammo and go range test it - to see if any benefits. The remaining pics are the device being assembled - the final pic shows the starting point ready for a drop, the round being ''processed'' of course would be within the guide/die piece, with appropriate punch.
I will report back later with results and mod's if needed - following which further down the line - hopefully some hard data from range testing.
His next comment was to the effect that he doubted the raccoon had been a nuisance or threat, way up in that tree in the middle of the swamp!
