Share Your Hammer Loads

300 PRC
163 HHT
Fed GM215M
ADG brass on 3rd firing
coal 3.595 (0.130 off the lands)
Lee FCD
H4350, H4831SC, RL23
Stability factor 2.38
All velocities via labradar

H4350 - This was tested on a 26” 8 twist Bartlein 3B Steel barrel
74.5 - 3288 fps
75.0 - 3301 fps (74.5 and 75.0 went into the same hole at 200 yards)
75.5 - 3344 fps faint ejector
76.0 - 3351 fps Ejector

The next two were tested on a 24” 8 twist Bartlein carbon fiber barrel. Conditions not ideal with a left to right wind of 14 to 26 mph.

H4831SC
80.0 - did not record
81.0 - 3245 fps
82.0 - 3284 fps
83.0 - 3317 fps faint ejector

RL23
80.0 - 3311 fps
81.0 - 3331 fps
82.0 - 3367 fps
83.0 - 3408 fps stiff bolt, ejector
Tested 81.7, 3 rounds averaged 3360 with ES of 10.6, grouping MOA

Backed charge down to 81.0, changed seating depth to 3.695 (0.030 off). Speed jumped to 3395 fps average on 3 shots, faint ejector, group not good.

Backed charge down to 80.0, tested seating depths from 0.040 off to 0.090 off, best was 0.070 off (3.655 OAL) with a group of 1.004” at 200 yards, speed 3347 with es of 27. Several of these seating depth tests had two round touching, and the third 1-2” off (both vertical and horizontal, so not just the wind)

Continued testing but groups got very erratic, about 35 rounds since last cleaning, 85 rounds on this barrel, it may still be speeding up. Will thoroughly clean and resume testing next week.

Getting close to dialing these in, RL23 seems to be the right powder. May try it again in a 26” barrel. The goal is to get the muzzle velocity to 3365 fps or greater, which would bring the 200 yard impact velocity above 3000 fps.
 
.308 - 16.5 inch bartlein - 1/10 twist
137 grain HH (138 average actual weight)
Lapua Brass - LRP
Fed 210M
IMR-8208-XBR Powder
30 thou off the lands
.003 neck tension
Work-up - 1x fired - 30 thou - scratched inside necks from trimmer
422560.2
432617.2
442693.8
44.52737.3
452760.8
45.52788.4
462809.545-46.5 grouped .28 moa at 200 yards
46.52827.3very slight swipe at 46.5
472871.2threw off group, no pressure at 47
47.52888.3swipe at 47.5 - will back off. Great accuracy, only decent speed
 
.308 - 16.5 inch bartlein - 1/10 twist
137 grain HH (138 average actual weight)
Lapua Brass - LRP
Fed 210M
Alliant AR-Comp Powder
30 thou off lands
.003 neck tension
Work-up - 1x fired - 30 thou - scratched inside necks from trimmer
38.52511.3
392522.3
402559.1
40.52615.4
412659.4
41.52683.7
422727.9
42.52746.1
432781.6
442828.4
44.52859.4Never found pressure
 
Little update;

Still haven't shot a 6.5 Creedmoor, but loaded up some 99HH's for a buddy. Started the ladder at 41gr, but rifle didn't settle in until 46gr. No pressure signs on the brass, but there is a little primer flow. This load is hot, but shoots well, and to the same POI as his factory stuff.

With a 99gr HH at almost 3400fps, I think he's goona be a convert!

6.5CM 22" 1/8T

99gr HH at 2.667" OACL

Brass : 1f Winchester (no crimp)
Primer : Fed 210
Powder : Varget

46gr 3390fps avg SD 12fps (98% load density)






Started playing with the 68gr HHT a bit in my .223 Rem. Might try 8208XBR next as I haven't been able to find pressure with Varget, and at 25.6gr powder is pushing the bullet back out of the case;

.223 Rem 1/8T 23" bbl

Bullet: 68HHT @ 2.380" OACL
Brass: Nosler 1x, .003 tension, 1/3T crimp
Primer: CCI BR4
Powder: Varget

24gr - 2760fps

24.4gr - 2831fps

24.8gr - no data
(Case almost full!)

25.2gr - 2930fps, 2938, 2928
(Lightly compressed here)

Windy conditions and group showed almost no vertical. will shoot 25.0 and 25.2 for groups in good conditions.



Also found some promise with the 122gr HHT in a very special .270Win, goona work on some crimps with 59gr H4350 moving forward.

270 win 24" 1/10T

122HHT at 3.311" OACL

Virgin Norma Brass, no crimp
Fed 210 Primers
H4350 Powder

55gr - error

56gr - 3240fps

57gr - 3257fps

58gr - 3330fps

59gr - 3387fps (100% load density)

56, 57, 58, 59 formed a .6moa group
 
Last edited:
JTH said:
300 PRC
163 HHT
Fed GM215M
ADG brass on 3rd firing
coal 3.604
Lee FCD
RL23
Stability factor 2.38
All velocities via labradar
Click to expand...

Follow up test this morning, found what I was looking for, 81.7 grains produced less than 1/2 MOA groups and at 3384 fps, the impact velocity at 200 yards will be 3018 fps. This is on the edge of pressure in my rifle, use caution.

IMG_0805.jpeg
 
Last edited:
6.5 Creedmoor, Savage Model 10, 24 inch barrel
Bullet: .264 125 HHT
Case: Reformed LC 11
Primer: WLR
Powder: H4350
COAL 2.826
Lee Crimp - 1/4 turn past Lee Instructions for starting point

Pressure Test
35 gr - 2521
36 gr - 2518
37 gr - No Read
38 gr - 2630
39 gr - No Read
40 gr - 2777
41 gr - 2841
42 gr - 2931
43 gr - 3003
44 gr - 3047 Heavy Bolt, Ejector Mark, Cratered Primer

Load
42.6 gr H4350 - Single hole, clover leaf, not measured
5 shot average - 2937.2 fps
ES - 33
SD - 12.235
 
final load 338-06AI
175hh
59 grains IMR 3031
Federal 210M
laupua brass
3.315 OAL
3127 average fps
3 shots 3133, 3126, 3124 in that order
3/8” 3 shot @ 100 yards, 2 in one hole 3rd touching.
Bansor rifle 21.5” barrel, 6# 2 oz rifle
load is slightly compressed, 1/4 crimp with rcbs die
 
Last edited:
300 Win Mag, Tikka T3X, 24.3 inch 1:10 barrel
Bullet: .308 154 HHT
Case: Peterson 300 WM Long, once fired
Primer: WLR
Powder: H4350
COAL 3.373
Lee Crimp - 1/4 turn past Lee Instructions for starting point

Pressure Test
79 gr - 3503
80 gr - 3597
81 gr - 3626
82 gr - 3650 Light Ejector Mark
83 gr - 3691 Heavy Bolt, Ejector Mark, Cratered Primer

Load
80.8 gr H4350 - .49 MOA @ 100 yds, .38 MOA @200 yds
4 shot average - 3634 fps
ES - 12
SD - 5.74
 
.257 Weatherby Mag
90 grain Absolute Hammer
26" Remington factory barrel 1 in 10" twist
Powder Hodgdon H414
Federal 215 Primer
New Remington brass formed from 7mm Rem Mag brass and outside neck turned.
COAL 3.155"
Lee Factory Crimp die 1/4 turn.
65 grains 3623 fps
66 grains 3738 fps
67 grains 3777 fps
68 grains heavy bolt lift on some rounds, did not chronograph.
Will use 67 grain load
Groups were a little over an inch at 100 yards. This rifle had not shot other brands of bullets well, grouping 2+ inches.
 
CALIBER: .______________6.5 Creedmoor
BULLET:________________118 gr. HHT
POWDER:______________ 45.5 Grains of StaBall 6.5
PRIMER: _______________CCI-BR2
BRASS _________________Lapua once fired
COAL: _________________2.780" 1/4 Lee crimp
BARREL LENGTH: ______24"
TWIST: ________________ 1-8
VELOCITY: 3024 fps
RIFLE: Tikka T3 Lite
Temp 48F
Elevation 2500 ft
Excess pressure signs at 46.2 gr.
Accuracy node was at 45.5 gr. 3/8" 5 shot group at 100 yards
 
6.5/06 AI

27", 1-8", 1/8 T FCD
118 HHT
57 degrees F
Peterson 280AI brass reformed
Rem LR primer

RL 16
51.0 3159
52.0 3205
53.0 3264
54.0 3301
55.0 3361
56.0 nr
57.0 3456 Ejector

H 100V
55.0 nr
56.0 3418
57.0 3451, Light bolt, ejector

Superformance
CCI 250 primer
59.0 3441
59.5 3466 light clicker, primer crater
60.0 3494 cratering, no clicker
60.5 3527 cratering
61.0 3540 cratering

retest:
61.0 3553 av, sd13, es 29, group elongated ragged hole @100
OAL TBD

Fill percentage all lower than ideal. May further test with RL 23 and RL 26. Powder level below shoulder of cartridge.
 
Last edited:
gltaylor said:
6.5/06 AI

27", 1-8", 1/8 T FCD
118 HHT
57 degrees F
Peterson 280AI brass reformed
Rem LR primer

RL 16
51.0 3159
52.0 3205
53.0 3264
54.0 3301
55.0 3361
56.0 nr
57.0 3456 Ejector

H 100V
55.0 nr
56.0 3418
57.0 3451, Light bolt, ejector

Superformance
CCI 250 primer
59.0 3441
59.5 3466 light clicker, primer crater
60.0 3494 cratering, no clicker
60.5 3527 cratering
61.0 3540 cratering

retest:
61.0 3553 av, sd13, es 29, group elongated ragged hole @100
OAL TBD

Fill percentage all lower than ideal. May further test with RL 23 and RL 26. Powder level below shoulder of cartridge.
Click to expand...
George, It is nice to see some 118HHT loads. I have a couple of questions. Honest questions. Wouldn't it be easier to neck up from 25-06? Any thoughts of using 4350?
 
Les,
Good question!
You can neck up 25-06 or neck down 30/06, but you end up with shorter necks after forming. 270s work well due to longer case length prior to forming.
Now that 280AI brass is available it's easier. You just have to turn necks down a bit.

To your other question, larger case volume begs for slower burn rate. I may go slower yet. My case fill % is still not optimal.
 
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