High Muzzle Energy rifles on Ministry of Defence Ranges

[Mattnall]

Energy is 0.5 x mass x velocity

E(kin)=½mv²

or
0.5 x mass(kg) x velocity(m/s) x velocity(m/s)

To convert rather than calculate try;
1J=0.737ft.lb
or
1ft.lb=1.356J

[DOGGER2UK]

RANGE CONDUCTING OFFICERS’ COURSE INSTRUCTION MANUAL

Fully revised and updated January 2020 Edition Ten

HME FIREARMS
3.1.20 High Muzzle Energy (HME) Firearms are those which, when firing specific ammunition, develop a muzzle energy (ME) in excess of 4,500 Joules (3.319 ft lbs). When used on any MoD range (including Bisley ranges) all such firearms must first be zeroed using a special zeroing procedure agreed with the MoD.

3.1.21 Except on the NRA Zero Range, this zeroing practice must be supervised by a specially trained and qualified RCO (HME). The procedure varies depending upon the distance at which the rifle is going to be used. Details can be found in Annex O.

3.1.22 The HME zeroing procedure must be undertaken on each and every occasion the HME firearms is to be used, except when it is to be used for an extended period of consecutive days, in which case it need only be zeroed at the beginning of the period of consecutive days.

3.1.23 If shooting is going to take place at distances greater than 200 yards or metres, special targets must be used for the zeroing procedure and the zeroing target of each firer must be signed by both the firer and the RCO (HME) to confirm that the correct procedures were followed. The target must be retained for a year.

3.1.24 The RCO is to record the use of any HME firearms in the MoD Form 906/906A, the Land Range Log.

3.1.25 The Range Office holds the Bisley Zero Range HME target. To qualify as an RCO (HME) an RCO must complete a special NRA RCO (HME) course.

[TRG-22]

Energy is 0.5 x mass x velocity

1 ft /lb equals 1.36 joules ish

I admit, I was being lazy in voting for #2.

Give bullet mass m in gr, and muzzle velocity v in ft/s, muzzle energy in joules is

2mv²e-6

Quite handy how all the various constants combine to .000002

[TRG-22]

Or using an image capture to work round the lack of superscript support here:

[TRG-22]

Sanity check of my maths - do these figures look right, if you interpolate any mass/velocity figures you know?

[glevum]

late post

[Mattnall]

Or using an image capture to work round the lack of superscript support here:

Don't need superscript, just hold 'ALT' and type 0178. Gives - ²

[GeeRam]

In our case we advised that we dont shoot HME as a Club, our local MOD Range does not permit HME and concluded that if that person wants to shoot HME then he should join a Club that participates in that Discipline and shoot with them.

^This.

Your members should have done their homework and asked the relevant question before buying their new 'toys'...not demand it from the club afterwards.

[IainWR]

The current HME Regs are available towards the rear of the NRA Handbook, freely avaliable online from the NRA website.
The last major change was in 2015 following a long negotiation between NRA and MoD. The result of that, with full explanation and copies of the definitive text, was distributed to all RCOs (HME) at the time and has been taught to all new RCOs (HME) since. If this is news to any such people PLEASE contact me at legal (at) nra.org.uk . Otherwise please ask your local RCO(HME) for a briefing on the actual situation. It is not straightforward. The reason it is not straightforward is that the procedure takes advantage of every concesssion MoD were prepared to grant. We could have written a simpler procedure, but many things that are allowed would have had to have been prohibited. The complexity is one of the major drivers for the involvement of an RCO(HME).

Iain Robertson
NRA Safety Legal and Technical Services

[TRG-22]

Or using an image capture to work round the lack of superscript support here:

Don't need superscript, just hold 'ALT' and type 0178. Gives - ²

So does just pasting that in from Windoze character map.

What about superscript -6?