- Thread starter
- #21
pharmseller
Handloader
- Feb 13, 2012
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TackDriver284":1byqq02p said:
What do you need?
You might get away with using 150 AMAX
P
150 grain ELD-X and 7mm-08
- Thread starter pharmseller
- Start date
What do you need?
You might get away with using 150 AMAX
P
TackDriver284
Handloader
- Feb 13, 2016
- 2,500
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pharmseller":488031h2 said:
P, you may want to get measurements off your existing bullet you are using,
hopefully get the data in the fields, ignore the grams and mm on right side,
just filling out the left side is sufficient. The last 3 is measurement of taper on the boattail.
Side note about the AMax, not sure if the data between the two bullets are the same but should be very close, but I can do a QL on both and see results.
- Thread starter
- #23
pharmseller
Handloader
- Feb 13, 2012
- 552
- 86
TackDriver284":231tyi21 said:pharmseller":231tyi21 said:
P, you may want to get measurements off your existing bullet you are using,
hopefully get the data in the fields, ignore the grams and mm on right side,
just filling out the left side is sufficient. The last 3 is measurement of taper on the boattail.
Side note about the AMax, not sure if the data between the two bullets are the same but should be very close, but I can do a QL on both and see results.
OAL 1.406"
Weight 150 gr
G1 BC .574
G7 BC .289
Diameter .284
The loaded round is 2.946"
That's quite a bit longer than SAAMI.
P
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- #24
pharmseller
Handloader
- Feb 13, 2012
- 552
- 86
Smallest diameter of the boattail is .237"
Length is .210"
I'm not sure how to measure the large diameter of the BT, isn't it .284"?
P
Length is .210"
I'm not sure how to measure the large diameter of the BT, isn't it .284"?
P
- Thread starter
- #25
pharmseller
Handloader
- Feb 13, 2012
- 552
- 86
FYI Nosler lists 49.5 gr Hunter as max for 150s from a 7mm-08 at 2.800".
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TackDriver284
Handloader
- Feb 13, 2016
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pharmseller":3kgjdw0u said:
It should be .284, did you measure it? Entered temp as 40 degrees, is that how cold it is up there?
BTW, I listed it as .284 as largest taper diameter. ELD X 150 grain. Without the capacity fill data, its close.
What was your charge weight? Barrel is 22 7/16ths? If so, entered as 22.4 inch. If using max in cold weather, you may want to back off a bit in hot weather, pressures may spike. If you could provide the case capacity, i'll be glad to crunch the numbers again.
Cartridge : 7 mm-08 Rem.
Bullet : .284 ELDX
Useable Case Capaci: 47.603 grain H2O = 3.091 cm³
Cartridge O.A.L. L6: 2.946 inch = 74.83 mm
Barrel Length : 22.4 inch = 569.0 mm
Powder : Ramshot Hunter ?, Temperature: 40 °F
Code:
Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !
Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time
% % Grains fps ft.lbs psi psi % ms
-10.0 97 44.10 2503 2087 41356 9107 92.7 1.303
-09.0 98 44.59 2533 2137 42796 9225 93.2 1.282
-08.0 99 45.08 2563 2188 44290 9340 93.8 1.262
-07.0 101 45.57 2593 2240 45842 9452 94.3 1.242
-06.0 102 46.06 2623 2292 47454 9561 94.8 1.222
-05.0 103 46.55 2653 2344 49130 9667 95.3 1.203
-04.0 104 47.04 2683 2398 50872 9769 95.7 1.184
-03.0 105 47.53 2713 2452 52682 9867 96.2 1.165 ! Near Maximum !
-02.0 106 48.02 2743 2507 54566 9962 96.6 1.147 ! Near Maximum !
-01.0 107 48.51 2773 2562 56526 10053 97.0 1.129 ! Near Maximum !
+00.0 108 49.00 2804 2618 58569 10139 97.4 1.111 ! Near Maximum !
+01.0 109 49.49 2834 2675 60695 10222 97.7 1.094 !DANGEROUS LOAD-DO NOT USE!
+02.0 110 49.98 2864 2732 62912 10300 98.0 1.077 !DANGEROUS LOAD-DO NOT USE!
+03.0 111 50.47 2894 2790 65223 10374 98.3 1.060 !DANGEROUS LOAD-DO NOT USE!
+04.0 112 50.96 2925 2849 67631 10443 98.6 1.044 !DANGEROUS LOAD-DO NOT USE!
+05.0 114 51.45 2955 2908 70147 10507 98.9 1.027 !DANGEROUS LOAD-DO NOT USE!
Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 10% relative to nominal value:
+Ba 108 49.00 2948 2894 71277 9997 100.0 1.027 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 108 49.00 2612 2272 47498 9709 90.2 1.220- Thread starter
- #27
pharmseller
Handloader
- Feb 13, 2012
- 552
- 86
According to your inputs the max book load is dangerous.
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TackDriver284
Handloader
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pharmseller":pny4bnop said:
It's based on your measurements, but without case fill its not accurate, its just a guide. You may have more case volume than what QL predicts resulting in lower pressure, who knows without your case fill. Nosler book max is 49.5 and QL max is 49.49, so its close.
pharmseller":3coq7ezk said:
Pharm, I wouldn't get so wrapped up in the charge weight. Lot differences will account for a couple of grains sometimes, the brand and lot of brass will also change quite a bit between different makers. The projection shows 2890'ish right at 65K PSI, the speed and pressure is the only way us hacks can get close to knowing what is going on. Plus, the 7-08 is only rated at 60K I think in QL, so unless that parameter is changed, it is going to show any charge over 60K as dangerous.
You can fiddle around with bullets and profiles and the H20 weight of the filled case, but the data is still going to read the same as in so much speed is going to produce so much pressure. Case capacity is just going to change the amount of powder used to get there.
Again, only you can be the judge if the load is okay in your rifle. If you get useful case life (over 5+ reloadings on the same case) and your rifle isn't acting quirky you will probably be okay. I don't know how Hunter handles heat, but there isn't much margin for if it does swing higher as the temps climb.
Backing off a mere 50FPS puts you down into a place that has some margin for safety and puts you into the 60-62K PSI range which I feel comfortable running all day long in a modern rifle with modern cases.
Not only heat but look out for moisture in your barrel.... I can tell you from experience many years ago on an Alaskan bush hunt that after 3 days of solid rain nothing in our camp was dry. When I finally did take a shot My ammo that was probably set up around 60k produced enough pressure that I had a very sticky bolt. Bottom line is if you can guarantee the same pristine conditions during the hunt that you have at the shooting range all will be well...BUT ...might not be realistic.
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- #31
pharmseller
Handloader
- Feb 13, 2012
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I measured CHE on half a dozen cases. The greatest expansion was .003", most were .002". That doesn't sound like much.
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- #33
pharmseller
Handloader
- Feb 13, 2012
- 552
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I didn't measure a factory round, I measured sized cases, then loaded and fired the cases, then measured again.
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pharmseller":1vzddemu said:
I was thinking measuring some fired factory loads or even your 140 Partition loads might give you some info on what a normal load looks like.
Either way, you may be a skosh high on PSI but if you are getting useful case life and excellent accuracy then I'd say rock on.
pharmseller , I did watch CHE for a few years . it's a very hard way to watch for over PSI . to start with you need a blade micrometer that measures to the tenth . you only measure brass on the second fire . virgin brass is to soft , third fire brass is to hard . you are looking for expansion of less than .0002 ( 2 tenths ) . you need to measure from the exact same place on the brass case . on my 7 rem mag I would align the fixed jaw of the mic with the 7 on the head stamp and measure straight across . there is a lot to it to try and get usable info . I can tell you this with certainty , your brass did not expand the case head by .002 - .003 . if it did your brass would not hold a primer , the pockets would be to loose .
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- #36
pharmseller
Handloader
- Feb 13, 2012
- 552
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I just ran the ballistics of the load. Based on 2900 fps and the conditions where I hunt, this load carries 1800 fps (minimum expansion velocity) out to a thousand yards. Not that I would ever shoot that far, but dang.
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- #39
pharmseller
Handloader
- Feb 13, 2012
- 552
- 86
I neck sized the brass I've been using with the 150 ELDX. The primer pockets were nice and tight, but they're only twice fired.
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- Thread starter
- #40
pharmseller
Handloader
- Feb 13, 2012
- 552
- 86
Bad news/good news:
The bad news was, I couldn't replicate my previous success with Hunter powder.
The good news, my new .223 really liked my standard load. That's three shots in the bull.
And more good news, this was the load recommended to me by Hornady, 41 gr Varget, .03" off the lands.
I need to chronograph it, but I'm not expecting much. Varget is slow.
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The bad news was, I couldn't replicate my previous success with Hunter powder.
The good news, my new .223 really liked my standard load. That's three shots in the bull.
And more good news, this was the load recommended to me by Hornady, 41 gr Varget, .03" off the lands.
I need to chronograph it, but I'm not expecting much. Varget is slow.
P
