Sulphuric acid

I thought cast lead was for the inside of Synchronome pendulum bobs?

Best regards,

Swarf, Mostly!

Clive,

I'm sure you - and a lot of keen pistol shots - could achieve that kind of accuracy, but the military people who probably only got to fire a few shots in training, if that, would have found it very much more difficult to hit anything.

PS - I think you mean the muzzle energy of the .44 Mag is 1200 ft.lbs - 12 is the legal limit for air rifles! Certainly 1200 is the figure I have in my memory. I gather quite a few in the USA like long range target shooting with 0.5" BMG rifles at 12,000 ft lbs - now that's what you call a stopper.

David

David, I just checked and the recoil is 18.5ft lb and the muzzle energy is stated at 1350ft lb.

To err is human, its been some years since i had the gun.

Clive

Clive,

Sorry, I misread your post - you said recoil, I read muzzle energy; my fault.

David

I don't think the average squaddie is intended to hit anything, just be able to place lots of bullets in the general area. Only snipers hit anything. That's why the normal sort of assault rifle isn't very accurate. When you are being shot at, you keep your head down, that stops you seeing what's going on and you can't shoot back. That's what's supposed to happen.

Listened to an interesting programme on ammunition on Radio 4 last night (which they most annoyingly insisted on referring to as "bullets". It was suggested that the switch to 5.56 mm was made in cold war days, in anticipation of a European war with lots of close fighting and for which a range of 3-400 m would be fine. This was proving to be quite unsuitable for an Afghanistan-type conflict, and they were having to take 7.62 mm machine guns and rifles out of store to be able to engage, with some hope of accuracy, at long ranges.

If you missed it, you can hear the programme (for the next week) on the Radio 4 listen again facility. Some interesting stuff about making the ammunition.

David

Edited By David Littlewood on 29/08/2012 11:35:31

The best form of defence is attack ! The modern Infantry now train in that method.

Accuracy of an assault rifle is not in question as the ballistics of the round dictate its application. Blasting off into the blue is not recommended and from my own experience does not happen as a target is indicated and firepower applied.

The military .308 is a very good round and will reach out to 4 to 500 mtrs with accuracy and the .223 ( the current mil. round) has a 9" rise and fall over 300 meters. What is in question is the terminal effect of the rounds, the .308 will stop a man and the .223 will in fact go through him but will incapacitate him. The idea is that it takes 3 more men to look after one injured man.

In preference I would choose the .308 and has always been my round of choice and I have fired a lot of different calibres.

The Kalashnikov round is also 7.62 but has different ballistics and terminal effects, it still kills and is very effective but in untrained hands is innacurate. The bullet has a steel core encased in lead and cupro nickel, this causes tumbling on impact.

The current sniper round is the Norma .338 and has enormous impact at extended ranges, hence the long range kills being quoted of up to 1800mtrs. Here, at those distances aiming off is needed and a spotter is always employed to give accurate info. to the shooter.

Clive

I use Sulphuric Acid drain cleaner to clean the shower trap once in a while. It says on the bottle Sulphuric Acid w/w 91% and seems pretty strong. Is there a cheaper source of supply anyone knows of as it's about £10 a litre from B&Q these days.

What are you wanting to use if for Vic?

Brian

I get 96% sulphuric acid from APC Pure:

**LINK**

Probably cheaper if you want something like 2.5 ltrs (£11.95). Only problem is the carriage is a bit expensive (£8?) as it has to be sent by courier but not bad if you want a few items. They also sell citric acid in bulk quantities and other hard to get chemicals. Very fast delivery as well.

John

What has any of this rubbish got to do with sulphuric acid?

As before, just cleaning the trap etc. I do once in a while use it for cleaning steel etc but not very often. Just wondered if there was a cheaper source than B&Q.

The usual confusion when a 3-year's dead thread is resurrected; it had become a long discussion of military issues.

For now, please keep it back on the original subject of sulphuric acid..

Neil

For descaling a drain you could use the more common HCl in the form of brick/patio cleaner wheich can also be used for de-rusting (see other threads as it has been well covered). If you are in a hard water area and occasionally de-scale the kettle you can re-use that as it is going down the drain anyway, just tends to be more benign.