Search found 1124 matches

by TenMetrePeter
Mon Jul 22, 2019 10:03 pm
Forum: General airgun chat
Topic: Twist Rate
Replies: 11
Views: 5531

Re: Twist Rate

Multiply that by 60!

800 * 60 * 12/17.7
= 32,542 rpm in .177

Roughly 24,000 rpm in .22

Bloody fast!

Its actually 1 in 450mm being bloody European, so yes 17.7inch, I was being lazy
by TenMetrePeter
Mon Jul 22, 2019 3:06 pm
Forum: General airgun chat
Topic: Twist Rate
Replies: 11
Views: 5531

Re: Twist Rate

Like rolls royce and bhp. “Its sufficient to do the job”

Lothar airgun blanks seem to be 1 in 18”

Quiz: in a 1 in 18 barrel what is the pellet rpm at the muzzle for 12 ft/lb in .22?
by TenMetrePeter
Mon Jul 22, 2019 9:05 am
Forum: General airgun chat
Topic: Dialing for elevation.
Replies: 24
Views: 13739

Re: Dialing for elevation.

I thought that might generate more discussion but I would have thought hold-over is a more used technique in vermin hunting where by the time you’ve faffed around with focussing your 30x and consulted the chart the rat has beggered off. It’s easier to set up a 4-9x at 25 yd and hold over. (Or even o...
by TenMetrePeter
Sat Jul 20, 2019 9:09 pm
Forum: General airgun chat
Topic: Dialing for elevation.
Replies: 24
Views: 13739

Re: Dialing for elevation.

Its been 20 years but I used elevation clicks and a table taped to the stock. Table generated on the sighting range. Using a big scope on max magnification allowed range finding by focus. Combine the two gives accurate ranging. Only held over for windage. This was FT. Never shot a bunny in my life. ...
by TenMetrePeter
Wed Jul 17, 2019 1:59 pm
Forum: TECHNICAL
Topic: Changing left hand bolt to right hand?
Replies: 10
Views: 14507

Re: Changing left hand bolt to right hand?

Yes. The handle arm and the boss have separate part numbers. The screw passes thru a hole in the arm so you can swivel it 180.

I used green Loctite on truck engine roller conveyor sprockets in 1980 in place of keyways and grub screws. Its an engineering adhesive.
by TenMetrePeter
Wed Jul 17, 2019 8:06 am
Forum: TECHNICAL
Topic: Changing left hand bolt to right hand?
Replies: 10
Views: 14507

Re: Changing left hand bolt to right hand?

The standard AA factory alloy bolt handle comes in two pieces and can be assembled either way round. Of you have one with an aftermarket handle like Rowan one piece brass handle then you will have to replace it When replacing the handle on the bolt you must avoid getting loctite in the bolt housing....
by TenMetrePeter
Wed Jul 10, 2019 2:29 pm
Forum: General airgun chat
Topic: Removed the brass firing pot.
Replies: 15
Views: 11461

Re: Removed the brass firing pot.

My 6ftlb MPR doesn't have the extension . I’ve never got to dismantle it and they’re so rare there’s no images online either.
by TenMetrePeter
Wed Jul 10, 2019 12:57 pm
Forum: General airgun chat
Topic: Removed the brass firing pot.
Replies: 15
Views: 11461

Re: Removed the brass firing pot.

OK thought it was one piece in those.
by TenMetrePeter
Wed Jul 10, 2019 9:59 am
Forum: General airgun chat
Topic: Removed the brass firing pot.
Replies: 15
Views: 11461

Re: Removed the brass firing pot.

What did you do with the valve spring S306?
If there wasn't one and you have no reg fitted then that may have been the problem.
The tube adjusts in and out to tension the valve spring. Quite interesting it is consistent at all.
by TenMetrePeter
Tue Jul 09, 2019 10:03 pm
Forum: Welcome back
Topic: New Arrival
Replies: 11
Views: 23393

Re: New Arrival

Take some cut up bits of coke can to shim up the scope at the back if you still can’t get the elevation. You will need to take care tightening up.