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Absolute Hammer load data

Mr. George, how about the VV N550 . I'm running the 151AH at 3267 out of my 06 20" barrel. Only problem I encountered was it is very heat sensitive , shows pressure in 80 plus degrees and none around 65 degrees. Anyone else have this problem with N550?
 
floyd kittrell said:
Mr. George, how about the VV N550 . I'm running the 151AH at 3267 out of my 06 20" barrel. Only problem I encountered was it is very heat sensitive , shows pressure in 80 plus degrees and none around 65 degrees. Anyone else have this problem with N550?
Click to expand...
VIT N550 is about .5fps increase per degree. If you can use H4350 it's .04fps increase.
 
Mike Matteson said:
VIT N550 is about .5fps increase per degree. If you can use H4350 it's .04fps increase.
Click to expand...
I will check the load data on the AH data, I do not think H4350 will give me the speed to get to the range I want to shoot this bullet out of a 20" barrel. I wanted at a minimum 3,300 FPS but do not now believe it is possible from what I have experienced so far. Probably a moot desire . Wishful thinking is not reality!
 
6.5-300 Wby Mag
123 AH
26" 1:8" T Wby Vanguard
New Wby brass. Neck expanded and 1/8 T Lee FCD
Federal 215
COAL: 3.6"

Reloder 17
68.0: 3298 fps
68.5: 3354 fps
69.0: 3367 fps
69.5: 3457 fps (light ejector swipe)
70.0: 3460 fps (light ejector swipe)
70.5: 3420 fps (light ejector swipe. Consider to be max for this rifle)
71.0: 3480 fps (light ejector swipe and stiff bolt)

Reloder 22
75.0: 3380 fps
75.5: 3357 fps
76.0: 3385 fps
76.5: 3412 fps (light ejector swipe)
77.0: 3410 fps (light ejector swipe)
77.5: 3474 fps (light ejector swipe. Consider to be max for this rifle)
78.0: 3507 fps (light ejector swipe and stiff bolt)

IMR 7828 SSC
75.0: 3262 fps
75.5: 3287 fps
76.0: 3283 fps
76.5: 3417 fps
77.0: 3330 fps
77.5: 3357 fps
78.0: 3385 fps
No signs of excess pressure, but velocity was not linear.

H4350
75.0: 3417 fps
75.5: 3462 fps
76.0: 3421 fps (light primer swipe. Consider to be max for this rifle.)
76.5: 3467 fps (heavy primer swipe and very stiff bolt). Stopped here.

Overall, some increase in speed over N560, but still not where I want to be especially considering the pressure signs. Given that this is the 3rd rifle in which the 123AH has not met velocity expectations, I see little sense in wasting additional powder on this endeavor. But, since I have 50 left, I'm open to suggestions.
 
just_jon said:
6.5-300 Wby Mag
123 AH
26" 1:8" T Wby Vanguard
New Wby brass. Neck expanded and 1/8 T Lee FCD
Federal 215
COAL: 3.6"

Reloder 17
68.0: 3298 fps
68.5: 3354 fps
69.0: 3367 fps
69.5: 3457 fps (light ejector swipe)
70.0: 3460 fps (light ejector swipe)
70.5: 3420 fps (light ejector swipe. Consider to be max for this rifle)
71.0: 3480 fps (light ejector swipe and stiff bolt)

Reloder 22
75.0: 3380 fps
75.5: 3357 fps
76.0: 3385 fps
76.5: 3412 fps (light ejector swipe)
77.0: 3410 fps (light ejector swipe)
77.5: 3474 fps (light ejector swipe. Consider to be max for this rifle)
78.0: 3507 fps (light ejector swipe and stiff bolt)

IMR 7828 SSC
75.0: 3262 fps
75.5: 3287 fps
76.0: 3283 fps
76.5: 3417 fps
77.0: 3330 fps
77.5: 3357 fps
78.0: 3385 fps
No signs of excess pressure, but velocity was not linear.

H4350
75.0: 3417 fps
75.5: 3462 fps
76.0: 3421 fps (light primer swipe. Consider to be max for this rifle.)
76.5: 3467 fps (heavy primer swipe and very stiff bolt). Stopped here.

Overall, some increase in speed over N560, but still not where I want to be especially considering the pressure signs. Given that this is the 3rd rifle in which the 123AH has not met velocity expectations, I see little sense in wasting additional powder on this endeavor. But, since I have 50 left, I'm open to suggestions.
Click to expand...
Gun may not like the bullets.
And you said other guns didn't like them.
I was getting those speeds from 127LRX.
 
just_jon said:
6.5-300 Wby Mag
123 AH
26" 1:8" T Wby Vanguard
New Wby brass. Neck expanded and 1/8 T Lee FCD
Federal 215
COAL: 3.6"

Reloder 17
68.0: 3298 fps
68.5: 3354 fps
69.0: 3367 fps
69.5: 3457 fps (light ejector swipe)
70.0: 3460 fps (light ejector swipe)
70.5: 3420 fps (light ejector swipe. Consider to be max for this rifle)
71.0: 3480 fps (light ejector swipe and stiff bolt)

Reloder 22
75.0: 3380 fps
75.5: 3357 fps
76.0: 3385 fps
76.5: 3412 fps (light ejector swipe)
77.0: 3410 fps (light ejector swipe)
77.5: 3474 fps (light ejector swipe. Consider to be max for this rifle)
78.0: 3507 fps (light ejector swipe and stiff bolt)

IMR 7828 SSC
75.0: 3262 fps
75.5: 3287 fps
76.0: 3283 fps
76.5: 3417 fps
77.0: 3330 fps
77.5: 3357 fps
78.0: 3385 fps
No signs of excess pressure, but velocity was not linear.
K.E.C. said:
Gun may not like the bullets.
And you said other guns didn't like them.
I was getting those speeds from 127LRX.
Click to expand...

H4350
75.0: 3417 fps
75.5: 3462 fps
76.0: 3421 fps (light primer swipe. Consider to be max for this rifle.)
76.5: 3467 fps (heavy primer swipe and very stiff bolt). Stopped here.

Overall, some increase in speed over N560, but still not where I want to be especially considering the pressure signs. Given that this is the 3rd rifle in which the 123AH has not met velocity expectations, I see little sense in wasting additional powder on this endeavor. But, since I have 50 left, I'm open to suggestions.
Click to expand...
Just_ jon,
I'm at a loss. The N560 was wonderful in the 26 Sherman Mag? I did use a bit more crimp? But that shouldn't make that much difference?
 
GLTaylor said:
Just_ jon,
I'm at a loss. The N560 was wonderful in the 26 Sherman Mag? I did use a bit more crimp? But that shouldn't make that much difference?
Click to expand...
GL,
I thought for sure N560 would be the one. I'm think testing with virgin brass may be a factor. A sample of FL sized 1X brass had H2O cap of 100.0 grains compared to 95.5 for virgin. Plan on rerunning ladders with 1X brass and see where it takes me. I'll also bump up the crimp as mine was very light.
 
6.5-300 Wby Mag
123 AH
26" 1:8" T Wby Vanguard
1X Wby brass. Neck expanded and 1/8 T Lee FCD
Federal 215M
COAL: 3.6"

N560
79.0: 3471 fps
79.5: 3499 fps
80.0: 3521 fps
80.5: 3553 fps sticky bolt stopped

IMR 7828 SSC
78.5: 3455 fps
79.0: 3449 fps
79.5: 3507 fps
80.0: 3525 fps
80.5: 3556 fps
81.0: 3573 fps heavy ejector swipe stopped
 
Wow…easiest AND most accurate load development I've ever had in 280ai. 16 shots and I'm done.

280ai, Terminus Kratos Lite, 24" proof cf 8twst. 140 AH, H4350, F210M, Peterson brass, 3.463" COAL
  1. Cleaned barrel to bare metal.
  2. Fired 2 foulers
  3. 10 shots for pressure ladder 57.5g - 62.0g all crimped 1/8T. 59.5g thru 62.0g all wadded up in very close POI. 62g showed slight ejector swipe so decided to load up some at 61.2g (4ea at various crimps 1/8T, 1/4T, 3/8T).
  4. Shot the 4 of 1/8T resulting in 0.117" group at 100yds. Stopped right there and didn't even test 1/4T and 3/8T. Best group I've ever shot out of a 280ai. Next step is to shoot some at 600yds to confirm BC
Initial Pressure Ladder
57.5 3153fps
58.0 3170
58.5. 3188
59.0 3217
59.5 3240
60.0 3275
60.5 3288
61.0. 3320
61.5 3336 very light ejector ping
62.0 3371 light ejector swipe

Pic is final load 4-shot group at 100yds
 

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