Share Your Hammer Loads

Finally got around start load work in a 6.5-284 I built a while back-
Tikka 24” CarbonSix 1:7
Peterson once fired
CCI200
109 OAL 2.940. About .75 for the whole string
123 OAL 3.070. Was about the same .75 for the string, last 2 opened it up to about 1.25.


109AHCci 200RL16
533298
53.53379
543391
54.53426Light BL
553462Same
55.53467Same

Never got more than a little stiffer bolt than normal. All made about .75moa.




123 AHCci200RL16
52.53249
533247
53.53281Light BL
543319BL
54.53333Heavy BL

These were about the same, other than the last two opened up a bit. I think that’s the only data I have that hasn’t been posted at LRH previously.
 
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choprzrul said:
CALIBER: 270 WSM
RIFLE: Browning X-Bolt
BULLET: 122gr HHT
POWDER: Alliant RL-16
PRIMER: Federal 215 match
BRASS Norma
COAL: 2.860"
BARREL LENGTH: 23"
TWIST: 10
START CHARGE: 60.0 Grains 3317 FPS
FINISH CHARGE: xxx
CRIMP: Lee Factory. Pretty tight to get crimp into the bullet groove.

had great plans to run load ladder. Had charges from 60.0gr to 64.8gr in 1% increments. Had 4 loaded at 60.0gr to zero and for cleaning shots....new scope and the barrel was thoughly cleaned after the fire forming and barrel break in 100 count.

All 4 of the 60.0gr casings showed .0005" to .001" head growth and a slight ejector circle. No stiff bolt, but I didn't try the 60.6gr round.....call me chicken.

To me, RL-16 seems to be a bit too fast burn for the 122gr HHT. Probably in the wheelhouse for the 116gr AH.
Click to expand...
Ok, I am dumb.

It's no wonder the above load showed signs of pressure right out of the gate....I double checked my work just now (now that hunting season is over, I can get this rifle back out of the safe). Turns out, using the Sinclair Bullet Seating Depth tool, I arrived at a max COAL of 2.836". This should be the measurement where the bullet is touching the rifling.

Going back and checking my load data quoted above, I had set the COAL to 2.860" for no other reason than to get 2 high points inside the case neck and have my crimp land nicely in the valley of the bullet.

Wrong!

I failed to notice that my 2.860" load was jamming 0.024"! No wonder pressure spiked at an entry level load. I was really bewildered that day at the range, but I resisted shooting the next 1% heavier load....and I'm glad I did. What caused the early pressure is pretty obvious to me now.

So, can someone please annotate on the published HHT data that the COAL I listed above should be very carefully checked before mirroring that load?

From here, I'm going to retest with RL16 using a COAL of 2.810" to give it 0.026" jump to the rifling. More to come, but I think this is a good illustration why we start low and work our way up carefully while watching for pressure.
 
270 WSM
Browning X-Bolt Speed 23" barrel, 1:10 twist

2.810" COAL, 0.026" jump to rifling
3/8 T Lee FCD
122 HHT
52 degrees F
Norma brass, 1x fired, annealed
Fed GM215M LRM primers

Alliant RL-16
59.7 3281 average 4 shots for cleaning rounds/warmup. group, 0.63"
60.3 3308
60.9 3341
61.5 3373 average 3 shot group, 0.4"
62.1 3398
62.7 vel error, ejector mark, head grew 0.001"

I think there is more speed to be had from this rifle/bullet combo.....if I could find RL-26 :-(
Quickload predicts 61.5gr, 124gr HH length set to 1.295" and weight set to 122gr, 23" barrel the velocity shows 3307....so not that far off. Where I found pressure at 62.7gr, QL shows it at 63,890 psi, or 73 psi over max. QL is just a rough guide.....

1702058884251.png
 
choprzrul said:
270 WSM
Browning X-Bolt Speed 23" barrel, 1:10 twist

2.810" COAL, 0.026" jump to rifling
3/8 T Lee FCD
122 HHT
52 degrees F
Norma brass, 1x fired, annealed
Fed GM215M LRM primers

Alliant RL-16
59.7 3281 average 4 shots for cleaning rounds/warmup. group, 0.63"
60.3 3308
60.9 3341
61.5 3373 average 3 shot group, 0.4"
62.1 3398
62.7 vel error, ejector mark, head grew 0.001"

I think there is more speed to be had from this rifle/bullet combo.....if I could find RL-26 :-(
Quickload predicts 61.5gr, 124gr HH length set to 1.295" and weight set to 122gr, 23" barrel the velocity shows 3307....so not that far off. Where I found pressure at 62.7gr, QL shows it at 63,890 psi, or 73 psi over max. QL is just a rough guide.....

View attachment 4475
Click to expand...
117 HH
69.5 R19
Fed Mag Primer
2.269 to ogive
3.450fps
22" barrel
Consistently .5 moa
Browning XBolt
 
Worked up a load for my 7mm Rem Mag. 26” bartlein barrel 1in8 twist on a ruger 77 tang safety action.
Brass-Peterson
Primer Rem9.5m
Bullet- 155 Absolute Hammer
Powder-RL26 71grs.
3.34 OAL
1/4 turn Lee factory crimp
Velocity 3220 by quick load but will verify on my chrono later.
I had worked my way up to 73grs but had a slight ejector mark. This group was at 100 yds.
 

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6.5x300 Weatherby Mag
124 Hammer Hunter
89 Grains H870
CCI 250 Primer
3.585 COL
1:8 twist
26” barrel
No chronograph
Weatherby Vanguard RMEF Edition rifle.

This load has shot multiple 3 shot groups ranging from 3/4” to 2” over the last 3 months at 200 meters.
 
22 NOSGAR (22 Nosler)
57gr HHT
CCI 450
1-8" Twist 20" Barrel AR-15
2000-MR
COAL 2.280
Hornady 6mm Hagar Brass
Starting Load 32 grains 3151fps
Max Load 36.6 grains 3534fps (no signs of pressure)
Final Load 36.3 grains 3508fps ave ES 6 SD 3
.33" group
1/4 crimp
 
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6.5 Creedmoor Weatherby Vanguard
109 Absolute Hammer
CCI 200
1-8" Twist 24" barrel
Varget
COAL 2.703
Gunwerks Brass
Starting Load 41.6gr 3068
Max Load 45.2gr 3327fps
Final Load 44.4 gr 3249fps ave ES 8 SD 4
.41" group
1/4" crimp
 
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7mm-08 Savage Axis Youth
131gr HH
CCI 200
1-9" Twist 20" Barrel
Big Game
COAL 2.836
Starline Brass
Starting Load 43.6 2951fps
Max Load 52.3gr 3064fps (never reached pressure, could fit any more powder. At 52.8 grains it belled out the case below the shoulder)
Final Load 52gr 3050fps ave ES 7 SD 4
.44" group
1/4" crimp
 
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