QL Request.

[ShadeTree]

I'd like to see how QL lines up with results I found with the 348 and Swift bullets if possible.

Case: Winchester W-W Super. Powder H-Varget. Bullet: 200 grain Swift A-Frame. Primer: CCI 200.

Swift's website states the bullet length is 1.020, but the few I measured are 1.032.

Approximate bearing surface from rear of cannulure to base is .468.

54 grains of Varget showed 2487 one day, and 2474 the next. 54.5 chrono'd at 2510. Just 1/2 grain above that at 55 spiked it to 2610 with sticky extraction on the initial lever break.

Edited to add: COAL is: 2.795

 

[TackDriver284]

Shade, I assume its a 22 inch barrel for that lever gun? After adjusting your burn rate to match your velocity, it seems 54.5 grains is right at max, but hard to say without your H20 case fill.

Cartridge          : .348 Win.
Bullet             : .348, 200, Swift A-Frame FN
Useable Case Capaci: 63.163 grain H2O = 4.101 cm³
Cartridge O.A.L. L6: 2.795 inch = 70.99 mm
Barrel Length      : 22.0 inch = 558.8 mm
Powder             : Hodgdon VARGET ?

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   87    49.05   2275    2298   35824   6764     87.8    1.281
-09.0   88    49.60   2298    2345   36738   6858     88.3    1.268
-08.0   89    50.14   2321    2393   37677   6951     88.8    1.255
-07.0   90    50.69   2345    2442   38644   7044     89.3    1.242
-06.0   91    51.23   2368    2491   39639   7136     89.8    1.229  ! Near Maximum !
-05.0   92    51.78   2392    2540   40663   7228     90.2    1.216  ! Near Maximum !
-04.0   93    52.32   2415    2591   41717   7318     90.7    1.204  ! Near Maximum !
-03.0   94    52.87   2439    2641   42802   7408     91.1    1.191  ! Near Maximum !
-02.0   95    53.41   2462    2693   43921   7496     91.6    1.179  ! Near Maximum !
-01.0   96    53.96   2486    2745   45072   7584     92.0    1.167  ! Near Maximum !
+00.0   97    54.50   2510    2797   46258   7671     92.4    1.155  !DANGEROUS LOAD-DO NOT USE!
+01.0   98    55.05   2534    2851   47480   7756     92.8    1.143  !DANGEROUS LOAD-DO NOT USE!
+02.0   99    55.59   2557    2904   48739   7840     93.2    1.131  !DANGEROUS LOAD-DO NOT USE!
+03.0  100    56.14   2581    2959   50036   7923     93.6    1.119  !DANGEROUS LOAD-DO NOT USE!
+04.0  101    56.68   2605    3014   51372   8005     94.0    1.107  !DANGEROUS LOAD-DO NOT USE!
+05.0  102    57.23   2629    3069   52751   8085     94.3    1.096  !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     97    54.50   2639    3093   53690   7905     97.5    1.092  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba     97    54.50   2355    2462   39193   7158     84.6    1.229

 

[ShadeTree]

Thank You TackDriver. No, they came with 24" barrels. Can't say this for certain but I believe the much less produced carbines were 20".

What is the proper way to measure H20 capacity? I just weighed a empty case with primer, then filled it to level full at the top of the neck and weighed it. The difference is 80.3 grains. That can't be right, can it??

 

[TackDriver284]

Thank You TackDriver. No, they came with 24" barrels. Can't say this for certain but I believe the much less produced carbines were 20".

What is the proper way to measure H20 capacity? I just weighed a empty case with primer, then filled it to level full at the top of the neck and weighed it. The difference is 80.3 grains. That can't be right, can it??

The best way is to weigh a empty 2X or 3X fired case ( 1X fired is OK ) with the fired primer intact and unsized. Weigh 4 empty cases and take note of the weight, and fill 4 cases with distilled water with an eyedropper and fill until the water is a little convexed on the top of the case mouth and weigh them. Subtract the filled weight by the empty weight and that is your H20 case fill data. I can use that and re adjust the Quickload for you for a more accurate data. And what is your air temp? I can adjust your barrel length as well.

 

[ShadeTree]

That was a 3x fired and unsized case. Air temp at the time I chrono'd them would've been approximately 70-75 degrees.

I could get a more accurate reading off of several cases by sometime tomorrow, but based on your description of how to do it, that initial reading should be close. Other than the distilled water part. Our water possibly has some minerals in it adding to the weight.

 

[BigBza]

What is the proper way to measure H20 capacity? I just weighed a empty case with primer, then filled it to level full at the top of the neck and weighed it. The difference is 80.3 grains. That can't be right, can it??

Remember water weighs a lot more than powder thanks to its density. What QL does is converts this to a volume. If you put a drop of dish washing liquid into the water it will have less of a bulge when it’s full.

You should measure the exact length of the barrel from the bolt face (closed) to the end. Use a cleaning rod and a bit of tape slide it into the barrel and when it touches the bolt face mark it off. This way once you have adjusted the burn rate to match the velocity you can then get the Barrel time of the bullet. Then there is a mathematical formula to calculate a node. Go to The-long-family.com and do some reading on optimal barrel time.

You may find that the accuracy node is a bit under the max velocity you are getting.


Sent from my iPhone using Tapatalk Pro

 

[jimbires]

the easiest way I've found to remove the little bubble on top of the case neck , just twist the corner of a paper towel and touch it to the water .or if you get a dripper on the outside of the case . this works great .

 

[ShadeTree]

What is the proper way to measure H20 capacity? I just weighed a empty case with primer, then filled it to level full at the top of the neck and weighed it. The difference is 80.3 grains. That can't be right, can it??

Remember water weighs a lot more than powder thanks to its density. What QL does is converts this to a volume. If you put a drop of dish washing liquid into the water it will have less of a bulge when it’s full.

You should measure the exact length of the barrel from the bolt face (closed) to the end. Use a cleaning rod and a bit of tape slide it into the barrel and when it touches the bolt face mark it off. This way once you have adjusted the burn rate to match the velocity you can then get the Barrel time of the bullet. Then there is a mathematical formula to calculate a node. Go to The-long-family.com and do some reading on optimal barrel time.

You may find that the accuracy node is a bit under the max velocity you are getting.


Sent from my iPhone using Tapatalk Pro

I've done that already for other reasons......it's how I determine the max OAL of where a particular bullet hits the lands. The barrel length to the bolt face is 24".

This gun has the factory barrel mounted V shaped buckhorn sights and me with near 50 yr old eyes. Accuracy node is anything with 3 shots inside a skoal can at 50 yds and I chest swell a little bit even at that. Lol.