338/378 kt

Discussion in 'Reloading' started by cdhunt, Mar 10, 2005.

  1. cdhunt

    cdhunt Active Member

    Messages:
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    Jul 23, 2004
    anybody load for this caliber using 50 bmg or retumbo powder for 250 gr. partition? if so print me some loads and chrono. readings. thanks
     
  2. Mike375

    Mike375 Active Member

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    Nov 3, 2001
  3. alremkin

    alremkin Well-Known Member

    Messages:
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    Dec 14, 2004
    Here's some data from realguns.com on the 338/378



    Warning: Bullet selections are specific, and loads are not valid with substitutions of different bullets of the same weight. Variations in bullet length will alter net case capacity, pressure and velocity. Primer selection is specific and primer types are not interchangeable. These are maximum loads in my firearms and may easily be excessive in others. All loads should be reduced by 10%, and developed following safe handloading practices as represented in established reloading manuals produced by component manufacturers. Presentation of these loads does not constitute a solicitation for their use, nor a recommendation.

    Cartridge: .338-378 Weatherby Magnum

    Rifle: Weatherby Mark V Accumark Max COL: 3.763"
    Barrel: 26" Reloading Dies: RCBS, CH4D
    Max case length: 2.913" Group distance: 100 yards
    Note: Weatherby Mark V Action rifles only

    Bullet Type Bullet
    Weight Bullet
    Diameter C.O.L. Net Water
    Capacity Powder
    Type Charge Primer
    Type Muzzle
    Velocity Muzzle
    Energy Group
    Size
    Nosler Ballistic Tip 200 .338" 3.760" 126.4 Reloder 22 112.0 CCI 250 3380 5075 1.2
    Nosler Ballistic Tip 200 .338" 3.760" 126.4 Reloder 25 118.0 CCI 250 3340 4955 0.7
    Nosler Ballistic Tip 200 .338" 3.760" 126.4 H 1000 117.7 CCI 250 3320 4896 0.7
    Nosler Ballistic Tip 200 .338" 3.760" 126.4 IMR 7828 111.5 CCI 250 3350 4985 0.5
    Sierra GameKing BTSP 215 .338" 3.700" 126.6 Reloder 22 110.6 CCI 250 3275 5122 0.4
    Sierra GameKing BTSP 215 .338" 3.700" 126.6 Reloder 25 117.0 CCI 250 3250 5044 0.5
    Sierra GameKing BTSP 215 .338" 3.700" 126.6 H1000 117.3 CCI 250 3260 5075 0.8
    Sierra GameKing BTSP 215 .338" 3.700" 126.6 IMR 7828 110.2 CCI 250 3270 5106 0.7
    Speer Boat Tail 2406 225 .338" 3.680" 126.1 Reloder 22 108.5 CCI 250 3195 5101 0.9
    Speer Boat Tail 2406 225 .338" 3.680" 126.1 Reloder 25 115.8 CCI 250 3200 5117 0.8
    Speer Boat Tail 2406 225 .338" 3.680" 126.1 H 1000 114.5 CCI 250 3150 4959 1.0
    Speer Boat Tail 2406 225 .338" 3.680" 126.1 IMR 7828 108.7 CCI 250 3200 5117 0.8
    Barnes XLC 225 .338" 3.760" 124.9 Reloder 22 108.5 CCI 250 3220 5181 1.2
    Barnes XLC 225 .338" 3.760" 124.9 Reloder 25 115.0 CCI 250 3190 5085 1.0
    Barnes XLC 225 .338" 3.760" 124.9 H 1000 115.5 CCI 250 3210 5149 0.8
    Barnes XLC 225 .338" 3.760" 124.9 IMR 7828 108.0 CCI 250 3200 5117 0.5
    Barnes XLC 225 .338" 3.760" 124.9 RS Magnum 116.0 CCI 250 3240 5246 0.9
    Sierra GameKing BTSP 250 .338" 3.760" 124.6 Reloder 22 104.5 CCI 250 3030 5098 0.7
    Sierra GameKing BTSP 250 .338" 3.760" 124.6 Reloder 25 112.6 CCI 250 3060 5199 0.7
    Sierra GameKing BTSP 250 .338" 3.760" 124.6 H 1000 111.2 CCI 250 3025 5081 0.7
    Sierra GameKing BTSP 250 .338" 3.760" 124.6 H 870 122.0 CCI 250 3080 5267 1.5
    Sierra GameKing BTSP 250 .338" 3.760" 124.6 IMR 7828 104.0 CCI 250 3020 5064 0.5
    Speer Grand Slam 250 .338" 3.760" 126.0 Reloder 22 104.5 CCI 250 3010 5031 1.1
    Speer Grand Slam 250 .338" 3.760" 126.0 Reloder 25 112.6 CCI 250 3040 5131 1.1
    Speer Grand Slam 250 .338" 3.760" 126.0 H 1000 111.8 CCI 250 3020 5064 1.4
    Speer Grand Slam 250 .338" 3.760" 126.0 H 870 124.0 CCI 250 3100 5336 1.8
    Speer Grand Slam 250 .338" 3.760" 126.0 IMR 7828 105.7 CCI 250 3050 5165 0.9
    Speer Grand Slam 250 .338" 3.760" 126.0 RS Magnum 117.0 CCI 250 3112 5377 1.3
    Woodleigh Weldcore PP 250 .338 3.760" 127.0 Reloder 22 104.0 CCI 250 2990 4964 1.5
    Woodleigh Weldcore PP 250 .338 3.760" 127.0 Reloder 25 111.5 CCI 250 3000 4997 1.1
    Woodleigh Weldcore PP 250 .338 3.760" 127.0 H 1000 112.3 CCI 250 3010 5031 0.8
    Woodleigh Weldcore PP 250 .338 3.760" 127.0 H 870 122.0 CCI 250 3040 5131 0.8
    Woodleigh Weldcore PP 250 .338 3.760" 127.0 IMR 7828 106.5 CCI 250 3055 5182 1.0
    Swift A Frame 275 .338 3.760" 123.6 Reloder 22 99.5 CCI 250 2845 4494 0.7
    Swift A Frame 275 .338 3.760" 123.6 Reloder 25 108.4 CCI 250 2900 5137 1.3
    Swift A Frame 275 .338 3.760" 123.6 H 1000 107.2 CCI 250 2875 5049 1.0
    Swift A Frame 275 .338 3.760" 123.6 H 870 117.5 CCI 250 2925 5226 1.4
    Swift A Frame 275 .338 3.760" 123.6 IMR 7828 101.0 CCI 250 2900 5137 0.9
     
  4. dgr416

    dgr416 Well-Known Member

    Messages:
    248
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    Mar 17, 2003
    Those loads from real guy are hot better watch out .I locked up my 338-378 with 112 grs of reloader 25 with 250 gr nosler partition.I got ejector marks at 110 grs.I backed down to 109 grs of reloader 25 with 250 gr bullet worked fine.
    The 338-378 KT is 1/4" shorter than the 338-378 dont use 3378-378 weatherby load data for it.Elmer Keith loved the 250 gr serria bullet in that gun.Hodgen has some data for it but I have seen very little other data.It should be really close to the 338 ultra mag in its loads you could check the case capicity to see.
     
  5. cdhunt

    cdhunt Active Member

    Messages:
    30
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    Jul 23, 2004
    Thanks everybody-I knew I could count on you for help. thanks again. CD