Shooting Sports USA - March 2020 - 44

FEATURE | KRAG

.30 U.S. Army cartridge launched a 220-grain
FMJ RN bullet at 2,000 fps (though Frankford
Arsenal apparently also loaded a heavier
230-grain bullet from 1893 to 1896). Velocity
increased to 2,200 fps after the SpanishAmerican War, but the U.S. did not step up
the .30-40's performance by changing over
to lighter, spritzer-type bullets as we did with
the .30-03/.30-06 cartridge.
At 44,000 psi, the breech pressure for the
.30-40 Krag is about on par with the .303
British cartridge, in deference to the Krag
bolt's single locking lug. The bolt does use
the back end of its guide rib as a second
"safety lug," but the rib does not (and
shouldn't) contact the receiver, so it provides
no additional support when the bolt is closed.
The root of the bolt handle also serves as a
kind of back-up safety lug-in case of a failure
of the bolt's locking lug and the guide rib.

BULLETS, BULLETS AND BULLETS
Krag rifling twist rate is 1:10 inch, fast enough
to stabilize its heavy bullet. Original Krag barrel
groove diameters were inconsistent by today's
standards, reportedly measuring anywhere

from .307 to .310 inch, so we can eliminate
much trial-and-error time and expense by
first slugging an original bore. If groove
depth of your rifle is, indeed, .308 inch then
commercial jacketed bullets are the order of
the day; if more than that, cast lead bullets
.002 to .003 inches over groove diameter may
be the way to go. Cast lead bullets of hard
enough alloy can be driven to the original
2,000 fps Krag velocity by the expert bullet
caster, but we don't need highest velocity
for short-range 200-yard Vintage Military
Rifle target competition, especially for heavy
.30-caliber bullets.
If you don't cast your own bullets, Oregon
Trail offers a 200-grain, .309-inch gas checked
hard-cast bullet that looks promising for the
Krag. I haven't examined them yet, but they
appear to be a bore-riding design, meaning
the forward portion is bore size (.300 inch)
while the back half is ostensibly .001 inch
over the also ostensible .308-inch groove size.
These are available from Midway USA.
Chambered for a long, heavy round-nose
bullet with a cartridge overall length (COL)
of 3.089 inches, the Krag necessarily is long
in the throat, causing lighter/shorter bullets
To paraphrase Henry Ford, since
prior to WWII you can buy factory
.30-40 Krag in any bullet weight you
want, so long as it's 180 grains.

44

MARCH 2020 | SSUSA.ORG


https://www.oregontrailbullets.com/xcart/ https://www.oregontrailbullets.com/xcart/ https://www.midwayusa.com/product/837126/oregon-trail-trueshot-cast-bullets-30-caliber-309-diameter-200-grain-lead-round-nose-gas-check-box-of-100 http://www.SSUSA.ORG

Shooting Sports USA - March 2020

Table of Contents for the Digital Edition of Shooting Sports USA - March 2020

Contents
Shooting Sports USA - March 2020 - Cover1
Shooting Sports USA - March 2020 - Cover2
Shooting Sports USA - March 2020 - 3
Shooting Sports USA - March 2020 - 4
Shooting Sports USA - March 2020 - 5
Shooting Sports USA - March 2020 - Contents
Shooting Sports USA - March 2020 - 7
Shooting Sports USA - March 2020 - 8
Shooting Sports USA - March 2020 - 9
Shooting Sports USA - March 2020 - 10
Shooting Sports USA - March 2020 - 11
Shooting Sports USA - March 2020 - 12
Shooting Sports USA - March 2020 - 13
Shooting Sports USA - March 2020 - 14
Shooting Sports USA - March 2020 - 15
Shooting Sports USA - March 2020 - 16
Shooting Sports USA - March 2020 - 17
Shooting Sports USA - March 2020 - 18
Shooting Sports USA - March 2020 - 19
Shooting Sports USA - March 2020 - 20
Shooting Sports USA - March 2020 - 21
Shooting Sports USA - March 2020 - 22
Shooting Sports USA - March 2020 - 23
Shooting Sports USA - March 2020 - 24
Shooting Sports USA - March 2020 - 25
Shooting Sports USA - March 2020 - 26
Shooting Sports USA - March 2020 - 27
Shooting Sports USA - March 2020 - 28
Shooting Sports USA - March 2020 - 29
Shooting Sports USA - March 2020 - 30
Shooting Sports USA - March 2020 - 31
Shooting Sports USA - March 2020 - 32
Shooting Sports USA - March 2020 - 33
Shooting Sports USA - March 2020 - 34
Shooting Sports USA - March 2020 - 35
Shooting Sports USA - March 2020 - 36
Shooting Sports USA - March 2020 - 37
Shooting Sports USA - March 2020 - 38
Shooting Sports USA - March 2020 - 39
Shooting Sports USA - March 2020 - 40
Shooting Sports USA - March 2020 - 41
Shooting Sports USA - March 2020 - 42
Shooting Sports USA - March 2020 - 43
Shooting Sports USA - March 2020 - 44
Shooting Sports USA - March 2020 - 45
Shooting Sports USA - March 2020 - 46
Shooting Sports USA - March 2020 - 47
Shooting Sports USA - March 2020 - 48
Shooting Sports USA - March 2020 - 49
Shooting Sports USA - March 2020 - 50
https://www.nxtbook.com/nxtbooks/nra/ssusa_202005
https://www.nxtbook.com/nxtbooks/nra/ssusa_202004
https://www.nxtbook.com/nxtbooks/nra/ssusa_202003
https://www.nxtbook.com/nxtbooks/nra/ssusa_202002
https://www.nxtbook.com/nxtbooks/nra/ssusa_202001
https://www.nxtbook.com/nxtbooks/nra/ssusa_201912
https://www.nxtbook.com/nxtbooks/nra/ssusa_201911
https://www.nxtbook.com/nxtbooks/nra/ssusa_201910
https://www.nxtbook.com/nxtbooks/nra/ssusa_201909
https://www.nxtbook.com/nxtbooks/nra/ssusa_201908
https://www.nxtbook.com/nxtbooks/nra/ssusa_201907
https://www.nxtbook.com/nxtbooks/nra/ssusa_201906
https://www.nxtbook.com/nxtbooks/nra/ssusa_201905
https://www.nxtbook.com/nxtbooks/nra/ssusa_201904
https://www.nxtbook.com/nxtbooks/nra/ssusa_201903
https://www.nxtbook.com/nxtbooks/nra/ssusa_201902
https://www.nxtbook.com/nxtbooks/nra/ssusa_201901
https://www.nxtbook.com/nxtbooks/nra/ssusa_201812
https://www.nxtbook.com/nxtbooks/nra/ssusa_201811
https://www.nxtbook.com/nxtbooks/nra/ssusa_201810
https://www.nxtbook.com/nxtbooks/nra/ssusa_201809
https://www.nxtbook.com/nxtbooks/nra/ssusa_201808
https://www.nxtbook.com/nxtbooks/nra/ssusa_201807
https://www.nxtbook.com/nxtbooks/nra/ssusa_201806
https://www.nxtbook.com/nxtbooks/nra/ssusa_201805
https://www.nxtbook.com/nxtbooks/nra/ssusa_201804
https://www.nxtbook.com/nxtbooks/nra/ssusa_201803
https://www.nxtbook.com/nxtbooks/nra/ssusa_201802
https://www.nxtbook.com/nxtbooks/nra/ssusa_201801
https://www.nxtbook.com/nxtbooks/nra/ssusa_201712
https://www.nxtbook.com/nxtbooks/nra/ssusa_201711
https://www.nxtbook.com/nxtbooks/nra/ssusa_201710
https://www.nxtbook.com/nxtbooks/nra/ssusa_201709
https://www.nxtbook.com/nxtbooks/nra/ssusa_201708
https://www.nxtbook.com/nxtbooks/nra/ssusa_201707
https://www.nxtbook.com/nxtbooks/nra/ssusa_201706
https://www.nxtbook.com/nxtbooks/nra/ssusa_201705
https://www.nxtbook.com/nxtbooks/nra/ssusa_201704
https://www.nxtbook.com/nxtbooks/nra/ssusa_201703
https://www.nxtbook.com/nxtbooks/nra/ssusa_201702
https://www.nxtbook.com/nxtbooks/nra/ssusa_201701
https://www.nxtbook.com/nxtbooks/nra/ssusa_201612
https://www.nxtbook.com/nxtbooks/nra/ssusa_201611
https://www.nxtbook.com/nxtbooks/nra/ssusa_201610
https://www.nxtbook.com/nxtbooks/nra/ssusa_201609
https://www.nxtbook.com/nxtbooks/nra/ssusa_201608
https://www.nxtbook.com/nxtbooks/nra/ssusa_201607
https://www.nxtbook.com/nxtbooks/nra/ssusa_201606
https://www.nxtbook.com/nxtbooks/nra/ssusa_201605
https://www.nxtbook.com/nxtbooks/nra/ssusa_201604
https://www.nxtbook.com/nxtbooks/nra/ssusa_201603
https://www.nxtbook.com/nxtbooks/nra/ssusa_201602
https://www.nxtbook.com/nxtbooks/nra/ssusa_201601
https://www.nxtbook.com/nxtbooks/nra/ssusa_201512
https://www.nxtbook.com/nxtbooks/nra/ssusa_201511
https://www.nxtbook.com/nxtbooks/nra/ssusa_201507
https://www.nxtbook.com/nxtbooks/nra/ssusa_201510
https://www.nxtbook.com/nxtbooks/nra/ssusa_201509
https://www.nxtbook.com/nxtbooks/nra/ssusa_201508
https://www.nxtbook.com/nxtbooks/nra/ssusa_201507
https://www.nxtbook.com/nxtbooks/nra/ssusa_201506
https://www.nxtbook.com/nxtbooks/nra/ssusa_201505
https://www.nxtbook.com/nxtbooks/nra/ssusa_201504
https://www.nxtbook.com/nxtbooks/nra/ssusa_201503
https://www.nxtbook.com/nxtbooks/nra/ssusa_201502
https://www.nxtbook.com/nxtbooks/nra/ssusa_201501
https://www.nxtbook.com/nxtbooks/nra/ssusa_201412
https://www.nxtbook.com/nxtbooks/nra/ssusa_201411
https://www.nxtbook.com/nxtbooks/nra/ssusa_201410
https://www.nxtbook.com/nxtbooks/nra/ssusa_201409
https://www.nxtbook.com/nxtbooks/nra/ssusa_201408
https://www.nxtbook.com/nxtbooks/nra/ssusa_201407
https://www.nxtbook.com/nxtbooks/nra/ssusa_201406
https://www.nxtbook.com/nxtbooks/nra/ssusa_201405
https://www.nxtbook.com/nxtbooks/nra/ssusa_201404
https://www.nxtbook.com/nxtbooks/nra/ssusa_201403
https://www.nxtbook.com/nxtbooks/nra/ssusa_201402
https://www.nxtbook.com/nxtbooks/nra/ssusa_201401
https://www.nxtbook.com/nxtbooks/nra/ssusa_201312
https://www.nxtbook.com/nxtbooks/nra/ssusa_201311
https://www.nxtbook.com/nxtbooks/nra/susa_201310
https://www.nxtbook.com/nxtbooks/nra/ssusa_201309
https://www.nxtbook.com/nxtbooks/nra/ssusa_201308
https://www.nxtbook.com/nxtbooks/nra/ssusa_201307
https://www.nxtbook.com/nxtbooks/nra/ssusa_201306
https://www.nxtbook.com/nxtbooks/nra/ssusa_201305
https://www.nxtbook.com/nxtbooks/nra/ssusa_201304
https://www.nxtbook.com/nxtbooks/nra/ssusa_201303
https://www.nxtbook.com/nxtbooks/nra/ssusa_201302
https://www.nxtbook.com/nxtbooks/nra/ssusa_201301
https://www.nxtbook.com/nxtbooks/nra/ssusa_201212
https://www.nxtbook.com/nxtbooks/nra/ssusa_201211
https://www.nxtbook.com/nxtbooks/nra/ssusa_201210
https://www.nxtbook.com/nxtbooks/nra/ssusa_201209
https://www.nxtbook.com/nxtbooks/nra/ssusa_201208
https://www.nxtbook.com/nxtbooks/nra/ssusa_201207
https://www.nxtbook.com/nxtbooks/nra/ssusa_201206
https://www.nxtbook.com/nxtbooks/nra/ssusa_201205
https://www.nxtbook.com/nxtbooks/nra/ssusa_201204
https://www.nxtbook.com/nxtbooks/nra/ssusa_201203
https://www.nxtbook.com/nxtbooks/nra/ssusa_201202
https://www.nxtbook.com/nxtbooks/nra/ssusa_201201
https://www.nxtbook.com/nxtbooks/nra/ssusa_201112
https://www.nxtbook.com/nxtbooks/nra/ssusa_201111
https://www.nxtbook.com/nxtbooks/nra/ssusa_201110
https://www.nxtbook.com/nxtbooks/nra/ssusa_201109
https://www.nxtbook.com/nxtbooks/nra/ssusa_201108
https://www.nxtbook.com/nxtbooks/nra/ssusa_201107
https://www.nxtbook.com/nxtbooks/nra/ssusa_201106
https://www.nxtbook.com/nxtbooks/nra/ssusa_201105
https://www.nxtbook.com/nxtbooks/nra/ssusa_201104
https://www.nxtbook.com/nxtbooks/nra/ssusa_201103
https://www.nxtbook.com/nxtbooks/nra/ssusa_201102
https://www.nxtbook.com/nxtbooks/nra/ssusa_201101
https://www.nxtbook.com/nxtbooks/nra/ssusa_201012
https://www.nxtbook.com/nxtbooks/nra/ssusa_201011
https://www.nxtbook.com/nxtbooks/nra/ssusa_201010
https://www.nxtbook.com/nxtbooks/nra/ssusa_201009
https://www.nxtbook.com/nxtbooks/nra/ssusa_201008
https://www.nxtbook.com/nxtbooks/nra/ssusa_201007
https://www.nxtbook.com/nxtbooks/nra/ssusa_201006
https://www.nxtbook.com/nxtbooks/nra/ssusa_201005
https://www.nxtbook.com/nxtbooks/nra/ssusa_201004
https://www.nxtbook.com/nxtbooks/nra/ssusa_201003
https://www.nxtbook.com/nxtbooks/nra/ssusa_201002
https://www.nxtbook.com/nxtbooks/nra/ssusa_201001
https://www.nxtbook.com/nxtbooks/nra/ssusa_200912
https://www.nxtbook.com/nxtbooks/nra/ssusa_200911
https://www.nxtbook.com/nxtbooks/nra/ssusa_200910
https://www.nxtbook.com/nxtbooks/nra/ssusa_200909
https://www.nxtbook.com/nxtbooks/nra/ssusa_200908
https://www.nxtbook.com/nxtbooks/nra/ssusa_200907
https://www.nxtbook.com/nxtbooks/nra/ssusa_200906
https://www.nxtbookmedia.com