ditchman Posted June 29, 2017 Author Report Share Posted June 29, 2017 Yep porting and honing. The gains can be rather large after tuning so best check on a chrony after. i have done several little things ...but they all add up dont they ... Quote Link to comment Share on other sites More sharing options...
figgy Posted June 29, 2017 Report Share Posted June 29, 2017 Let us know what it shoots like when it's ran in. Mine were pellet on pellet more akin to shooting a PCP than a springer. Quote Link to comment Share on other sites More sharing options...
ditchman Posted June 29, 2017 Author Report Share Posted June 29, 2017 Let us know what it shoots like when it's ran in. Mine were pellet on pellet more akin to shooting a PCP than a springer. i will...........Whitebridges sent me a whole load of different pellets...and im just waiting for some H&N's to come in then im off for a session............ive mic'd upa few so ive sorted them out to head size...and will take it from there.......... Quote Link to comment Share on other sites More sharing options...
Medic1281 Posted June 29, 2017 Report Share Posted June 29, 2017 I wish I had the skill to do all this with my mk1 mercury! Quote Link to comment Share on other sites More sharing options...
bruno22rf Posted June 29, 2017 Report Share Posted June 29, 2017 TBH , with your barrel/breach having been machined off centre I would imagine that the whole shebang is out of line with the cylinder? As your scope is going to curl it's toes around the cylinder I'm guessing that , once zeroed, the pellets will strike slightly one side or the other at anything other than the zeroed range - the further from point zero the greater the drift? Quote Link to comment Share on other sites More sharing options...
ditchman Posted June 30, 2017 Author Report Share Posted June 30, 2017 TBH , with your barrel/breach having been machined off centre I would imagine that the whole shebang is out of line with the cylinder? As your scope is going to curl it's toes around the cylinder I'm guessing that , once zeroed, the pellets will strike slightly one side or the other at anything other than the zeroed range - the further from point zero the greater the drift? you are right in what you say...and i have identified this problem.....it shoots spot on ...no deviation left or right...BUT... the deviation is up and down.....it shoots low...( a common fault with break barrels)...to this end i have shimes the rear ofthe scope mounts............... when i have found a decent pellet and it is printing where i want...i will address the issue of making the barrell paralell.....when closed between the breech and the pressure chamber ...there is a 12-14thou gap....what i will do is to get some fine emery strip and bit by bit rub down in situ the pin beneath the detante lock...which will bring the barrel up ...and finally level/parrellel with the pressure /spring chamber.............................if i screw it up ..it is not a problem ..as the new pin is only £2.50..... anyway ...that is my plan of action...it will be the last thing i do tho' Quote Link to comment Share on other sites More sharing options...
chris1961 Posted June 30, 2017 Report Share Posted June 30, 2017 My murcury piston has always been tight fit it still is even after 30 years use as for Cork screw try a heavier pellet mine shoots Bisley magnums fine Quote Link to comment Share on other sites More sharing options...
ditchman Posted June 30, 2017 Author Report Share Posted June 30, 2017 My murcury piston has always been tight fit it still is even after 30 years use as for Cork screw try a heavier pellet mine shoots Bisley magnums fine among the pellets i have got for testing are some Bisley magnums...and so far they seem to have the largest head size... Quote Link to comment Share on other sites More sharing options...
figgy Posted June 30, 2017 Report Share Posted June 30, 2017 The old Eley Wasp in the blue tin at 5.6mm were good. New ones are rubbish. Quote Link to comment Share on other sites More sharing options...
ditchman Posted June 30, 2017 Author Report Share Posted June 30, 2017 The old Eley Wasp in the blue tin at 5.6mm were good. New ones are rubbish. agree...fine for the 22 i have 177 tho.....but whitebridges sent me some repro's from a long while ago.....still a bit small on just a tad over 4.5.....the bisley mags are averaging ..(to 2 decimal places)...4.52............ Quote Link to comment Share on other sites More sharing options...
Whitebridges Posted July 5, 2017 Report Share Posted July 5, 2017 Have you managed to do any testing Ditchy? Just wondered if you've found the right ammo? Quote Link to comment Share on other sites More sharing options...
ditchman Posted July 5, 2017 Author Report Share Posted July 5, 2017 Have you managed to do any testing Ditchy? Just wondered if you've found the right ammo? no i havnt............ive just got a couple of more things to do...put a new TV ariel up and clean the chimney....then i can free up some time before i start onthe landrover.. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.