That's screaming
Absolute Hammer load data
- Thread starter RockyMtnMT
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dougduey
Well-Known Member
you're going to love this load. Basically have the same with the 109 in my 6.5-284 (3511 fps)
Thanks for sharing, I have an extreme hunter with same 8.7 twist barrel so may try this load also. My barrel was chopped to 20" so I may shoot for 3,400.
Hard rock
Well-Known Member
Just read this post I thank you for helping the Dove Shooter he's a friend of mine and his dad was my best friend that past away a few years ago I just so happen too have some n 560 he can try
Glad to help. I'm still learning on these myself. Hope he finds a load that works foe him.
SuperBruce
Well-Known Member
For my first post I thought I'd contribute some data! Standard disclaimer: this worked for me by is quite possibly unsafe for you so consider this a journal of what I did and not what you should do.
Initial search with my Bergara B14 Ridge SP in 308Win (18in barrel), 151 AH, H4895, CCI 200, FL sized Lapua, 2.785 COL, 3/8 turn FCD (some iffyness on when engagement started, but a slight crimp):
I used a case vibrator to settle the powder and despite that started to get compression at 46 grains but it seemed manageable. I tried one round at 47.5gr that didn't get picked up by the chrono but I didn't see any pressure signs. I had hoped to find a load at 2900+ so later I'll explore between 46 and 48 for a consistent and accurate load.
I've also had real good success with Ramshot TAC which is almost the same burn rate but a lot less bulky. Same components as above other than powder (now TAC) and COL was 2.810 without crimp:
Of those 49.0 showed a slight ejector mark and sticky bolt on one of two rounds. I ended up with 47.7 for my final load as it gave me consistent velocity and roughly MOA accuracy which was good enough for this years hunting season. Of note, that is the same charge I use for 130 TTSX loads.
I have to say, I'm super impressed with these bullets. The BC is a bit low but for the ranges I aspire to hunt the extra velocity more than makes up for it and an 1800 fps expansion threshold gives a little more wiggle room for the long shot's I'll almost certainly never take.
Initial search with my Bergara B14 Ridge SP in 308Win (18in barrel), 151 AH, H4895, CCI 200, FL sized Lapua, 2.785 COL, 3/8 turn FCD (some iffyness on when engagement started, but a slight crimp):
| 42.9 | 2749 |
| 44.5 | 2824 |
| 45.5 | 2836 |
| 46.0 | 2876 |
| 46.5 | 2917 |
| 47.0 | 2943 |
I used a case vibrator to settle the powder and despite that started to get compression at 46 grains but it seemed manageable. I tried one round at 47.5gr that didn't get picked up by the chrono but I didn't see any pressure signs. I had hoped to find a load at 2900+ so later I'll explore between 46 and 48 for a consistent and accurate load.
I've also had real good success with Ramshot TAC which is almost the same burn rate but a lot less bulky. Same components as above other than powder (now TAC) and COL was 2.810 without crimp:
| 45.0 | 2772 |
| 46 | 2818 |
| 47.0 | 2916 |
| 47.5 | 2927 |
| 48.0 | 2953 |
| 48.5 | 3000 |
| 49.0 | 3030 |
I have to say, I'm super impressed with these bullets. The BC is a bit low but for the ranges I aspire to hunt the extra velocity more than makes up for it and an 1800 fps expansion threshold gives a little more wiggle room for the long shot's I'll almost certainly never take.
nealm66
Well-Known Member
Thanks for this! I have a 308 coming up to reload for and this really helps
I've tried it 6.5 saum and it's awesome.
dougduey
Well-Known Member
Running the 109 in my 6.5-284 with HV100 and getting 3511 fps with excellent accuracy. Destroyed a pronghorn this past August with this exact load
Have you shot the 124 HH out of the same gun? If so, what velocity? Just curious to see how it compares to mine... Also wondering if the n560 would get us higher velocities in this case (like that PRC) or if that isn't a good powder/case match?
dougduey
Well-Known Member
Yes I have. It was around 3240 fps but the more accurate node was 100fps slower. I believe I was using H4831. Can't remember if it was that or RL23, but I'm pretty sure it was H4831.
Kimber MA - 24" barrel w/ 1-9 twist
280 Ackley Improved
140 AH
Virgin Nosler Brass
Fed 210M
COAL - 3.330
55 gr IMR 4166 w/ (1/4 T Crimp)
MV: 3292 fps ES:18 SD:5.9 (10 shots) - faint ejector
3/4 MOA
Had ejector and bolt lift resistance at 57 gr (3381 fps)
280 Ackley Improved
140 AH
Virgin Nosler Brass
Fed 210M
COAL - 3.330
55 gr IMR 4166 w/ (1/4 T Crimp)
MV: 3292 fps ES:18 SD:5.9 (10 shots) - faint ejector
3/4 MOA
Had ejector and bolt lift resistance at 57 gr (3381 fps)
cooperjd
Well-Known Member
7mm rem mag
24" 1:8" lilja
Petersen brass, 1x
Cci-250
1/8 lee fcd
IMR-4955
Magnetospeed
172 AH
62gr—??
63gr—2960
64gr—2981. Have some primer firing pin flow but not bad
65gr—3068
66gr—3148. Click at top of bolt lift. Ejector mark. Too hot.
24" 1:8" lilja
Petersen brass, 1x
Cci-250
1/8 lee fcd
IMR-4955
Magnetospeed
172 AH
62gr—??
63gr—2960
64gr—2981. Have some primer firing pin flow but not bad
65gr—3068
66gr—3148. Click at top of bolt lift. Ejector mark. Too hot.
