Jump to content

John MH

Global Moderator
  • Posts

    3,219
  • Joined

Posts posted by John MH

  1. 14 minutes ago, Scotch_egg said:

    Keep shooting what you got. 
     

    you can shoot very well. It’s not the scope that held you back. 


     

    Good point, take a look through someone else FFP scope before switching. For wind holds a SPF scope is usually ok if holding left or right hand edge and you can usually see a splash for referencing your left or right hold. Problem only really occurs for elevation holds when shooting multiple targets at different ranges when you don't want to or don't have time to dial in. You might get away with holding top, centre or bottom of target if they are reasonably close together say (250, 300, 350) but that depends on how big the target is and how flat your bullet shoots. If shooting two targets at say 200 & 400 yards with no time to dial then a SFP scope may cause problems but they do usually have a zoom setting where they are mil for mil or moa for moa, that may be in the scope literature (manual) or you may have to do a test/trial to figure it out for yourself.

  2. Extract from Bisley Range Rules

    Quote

     

    Limits as to Calibre, Muzzle Velocity and Muzzle Energy

    6. No firearm and ammunition combination which develops a muzzle energy exceeding 7000 J (5160 ft lb) may be used on any of the Bisley ranges without the specific permission of the CE which must be sought in writing well in advance of the planned use. The following limits apply:

    a. Rifle ranges, no specific calibre limitation but:

    i. a maximum muzzle velocity of 1000 m/s (3280 ft/s)
    ii. a maximum muzzle energy of 4500 J (3319 ft lb);

    b. Gallery Rifle and Pistol ranges, no specific calibre limitation but:

    i. a maximum muzzle velocity of 655 m/s (2150 ft/s)
    ii. a maximum muzzle energy of 2030 J (1496 ft lb).

    c. High Muzzle Energy (HME) firearms no specific calibre limitation but:

    i. a maximum muzzle velocity of 1000 m/s (3280 ft/s)
    ii. a maximum muzzle energy of 7000 J (5160 ft lb).

     

    Additional Limits on High Muzzle Energy (HME) Firearms

    8. A High Muzzle Energy (HME) Firearm is defined as any firearm which, using a particular round, develops a muzzle energy (ME) in excess of 4500 J (3319 ft lb). The HME zeroing procedure must be carried out before they may be fired on any range at Bisley. The firearm may be zeroed:

    a. on the Zero Range using a special target supplied by the Range Office.

    b. under control of an RCO (HME) at the start of the practice for shooting at 200 yards or less .

    c. at a distance of 200 yards on a special target under the direction of an RCO (HME) (see paragraph 39 below) prior to shooting at greater distances.

    9. Rifles chambered for .338” may not be fired on the Bisley Ranges

     

    What does "Rifles chambered for .338” may not be fired on the Bisley Ranges" its too vague, .338 is a bore diameter and not a specific chambering. It's likely that they meant anything similar to .338 Lapua Magnum when they wrote it but things change over time and new chamberings are developed and introduced i.e. 33XC.

    I recall it was a knee jerk reaction based on Air Danger Height at the time. The military changed their regulations and required specific training for 8.6mm ammunition (.338 Lapua).

    From DSA 03.OME Part 3 Volume 2 (V1.0)

    23. Air Danger Height. The Air Danger Height (ADH) is the maximum height above ground level (AGL) which a hazard may exist (see Notes 1 and 2). Table 1 below gives ADH for SA ammunition .

    731803976_Screenshot2020-09-28at07_32_39.thumb.png.7815fee36365540dd9cdd5e91fc3cf7d.png

    Notes:

    Table 1 - SA Ammunition ADH

    1.   The ADH is either the highest point of an aimed shot measured from the firing position or its maximum ricochet height. 

    2.   An ADH is measured in feet (ft) AGL. Altitude is measured in ft Above Mean Sea Level (AMSL). 

    3.   For High Elevation Fire (HEF) (QE 150 - 1250 mils, Fig 15 - 3) the ADH provided should be applied when the Cone of Fire is not captured by the ground. 

    4.   7.62mm ball may be fired with an ADH of 500ft providing an air sentry is provided and the air sentry has clear vision of the air space over the range. The minimum Duties of Air Sentries are given in Pamphlet 21. 

    5.   8.6mm ammunition may be fired with an ADH of 500ft on LFMT ranges provided that the sniper progression of training and authorised sniper practices are adhered to.

    Bisley shares the same Danger Area as MoD Pirbright Ranges so same/similar rules apply, civilians cannot comply with Note 5 above as they have not completed the 'sniper progression of training', another additional complication is that British Army Snipers do train on Bisley Ranges.  Note 5 above applies to all LFMT MoD Ranges so is nationwide, however, its all about 8.6mm Ball Ammunition and the NRA have tried generalised it.

    Here ends the lesson for today.

  3. Suffered a case stuck in a resizing die a few weeks back, first time in over 35 years reloading ammunition. Tried several methods to remove it which included amongst other things a hammer and punch and a spell in the freezer for the die but all to no avail.

    Bought two stuck case removers, a Forster kit and an RCBS kit. Forster kit was unsuitable and the actual 'stuck' case remover is just a round ended punch which you are supposed to hammer, the other parts of the kit are to allow you to remove the decapping stem and expander ball from Forster type dies. The RCBS kit included a drill bit, tap and bolt which worked well, case gets trashed but not the die but you do need to hold the die tightly as a lot of torque was needed to pull the case free.

    I've now got something that I hope I never need again but will be keeping it.

  4. So took it out to a Mile today and its accurate, worked out from 600, 860, 1000, 1400, 1560 and the 1760 yards. Applied Ballistics software was spot on for elevation with 36.75 MOA required from a 100 yard zero, conditions were not ideal the wind was difficult to read and was fish tailing left to right, mirage was mostly good but when at 1560 and 1760 yards it was making the targets difficult to see. There as one steel target sized to 1 MOA (17.6" diameter) at a the mile my first shot at that distance was 2 MOA off to the side, observing the splash I took a compensating 2MOA hold and the second shot resulted in an impact.

    I had staked out a Hugh Nevin Engineering Fig 14 to shoot at once at the mile but the mirage made it very difficult to see and despite 5 attempts I failed to get an impact, elevation was good but they were dropping off to the side both left and right in the fish tailing wind.

    I have decided to back off the load a little and will drop down to 123 grains of RS 80 for my next outing.

×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use and Privacy Policy