Suprisingly Good Results - Quick Load data request

[NYDAN]

I really pushed the envelope today to shoot some test loads in my .270 Win. I got impatient to shoot and ended up shooting several tests in a snow shower.

The charge increment/velocity test working up H-4350 with a 140 gr. AB followed quite closely the velocities predicted by QL data provided by Dr.Mike.

I was also very interested to workup a powder charge/velocity test for RL 22 and a 150 gr. CTBST. I started at 55.0 gr. and worked up to 56.5 gr. (Nosler load data max.) in 1/2 gr. increments. That meant four shots in this trial. Surprisingly, the four shots yielded a 3/4" group. However, the velocity at 56.5 gr. was only 2824 fps. It seems to me that getting a 3/4" group with 4 different powder charges in a snow storm is very encouraging.

Would someone be so kind as to run a QL predicition using the following data? If possible, I would like to get to 2900 fps. Thank you.

.270 Win
24" barrel
RL 22 Powder
150 gr. CTBST bullet
case capacity of 71.3 gr.
C.O.A.L. of 3.400"

PS - How come the snow flakes didn't deflect the bullets? Not enought mass to the snow flakes?

 

[nvbroncrider]

Dan,

Fluid dynamics. Same reason when you drive you don't need wipers at highway speeds but need then in city stop and go traffic. It's all physics.

Jake

 

[DrMike]

Cartridge          : .270 Win. (SAAMI)
Bullet             : .277, 150, Nosler CT BalSilTip 51100
Useable Case Capaci: 63.996 grain H2O = 4.155 cm³
Cartridge O.A.L. L6: 3.400 inch = 86.36 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : Alliant Reloder-22

Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% 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

-20.0   83    49.36   2431    1968   32162  10390     91.3    1.561
-18.0   85    50.59   2494    2072   34429  10723     92.6    1.521
-16.0   87    51.83   2557    2178   36869  11044     93.8    1.482
-14.0   89    53.06   2620    2287   39481  11350     94.9    1.432
-12.0   91    54.30   2684    2399   42285  11640     95.9    1.387
-10.0   93    55.53   2747    2513   45305  11913     96.8    1.342
-08.0   95    56.76   2810    2630   48550  12166     97.6    1.300
-06.0   97    58.00   2873    2749   52011  12399     98.3    1.259
-04.0   99    59.23   2936    2871   55706  12610     98.8    1.220  ! Near Maximum !
-02.0  101    60.47   2999    2995   59672  12798     99.3    1.182  ! Near Maximum !
+00.0  103    61.70   3061    3121   63930  12960     99.7    1.146  ! Near Maximum !
+02.0  106    62.93   3123    3249   68508  13098     99.9    1.111  !DANGEROUS LOAD-DO NOT USE!
+04.0  108    64.17   3185    3378   73436  13208    100.0    1.077  !DANGEROUS LOAD-DO NOT USE!
+06.0  110    65.40   3246    3510   78745  13294    100.0    1.044  !DANGEROUS LOAD-DO NOT USE!
+08.0  112    66.64   3307    3642   84475  13372    100.0    1.013  !DANGEROUS LOAD-DO NOT USE!
+10.0  114    67.87   3367    3777   90669  13446    100.0    0.982  !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    103    61.70   3195    3399   77417  12481    100.0    1.058  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba    103    61.70   2869    2741   50948  12825     95.1    1.262

270 Win, 24 inch barrel
OAL 3.400 inches, RL22, 150 CT BST
Overflow Case Capacity 71.3 gr

 

[NYDAN]

DrMike,

Happy New Year. Thank you very much. I see that the QL predictions are running close to my measured velocities so far. This data is very useful. I feel more comfortable CAREFULLY exploring charges greater than the book value with this information. Now I can't wait to try some more loads.

Dan

 

[DrMike]

The more measurements (overflow case capacity, OAL, etc.), the more accurate the projections. You can actually become quite precise if you are willing to work the data.

 

[hubcap]

Certainly quick load has been real,real close for me and my .270,s. It is comforting to know some my old school loads are not in the quick load danger zone. Ha, Close though.

 

[Rol_P]

Happy New Year Fellas.. This is very interesting and new to me.. I have a Rem.700 in .270 Win. which my go to load is 54.5 gr of IMR 4350 with Sierra 130 bullets. Generally just about 1" groups @ 100yds. I have not loaded for the .270 since I picked up the 30-06 for elk last year.

Question: Should I invest in Quick Load to help me fine tune my 30-06 hand loads?
My groups with Nosler 180 Accubonds group right around MOA @ 2,750FPS using 61.0 gr Reloder 22 and WLR primers in new Nosler cases.

Question #2: What is the effect of different primers, changing seating depth and variations in crimping on Quick Load results?

As you can see from these questions I have a lot to learn, but thoroughly enjoy the challenge. Thanks in Advance. Rol

 

[DrMike]

Happy New Year Fellas.. This is very interesting and new to me.. I have a Rem.700 in .270 Win. which my go to load is 54.5 gr of IMR 4350 with Sierra 130 bullets. Generally just about 1" groups @ 100yds. I have not loaded for the .270 since I picked up the 30-06 for elk last year.

Question: Should I invest in Quick Load to help me fine tune my 30-06 hand loads?
My groups with Nosler 180 Accubonds group right around MOA @ 2,750FPS using 61.0 gr Reloder 22 and WLR primers in new Nosler cases.

Question #2: What is the effect of different primers, changing seating depth and variations in crimping on Quick Load results?

As you can see from these questions I have a lot to learn, but thoroughly enjoy the challenge. Thanks in Advance. Rol

QuickLoad is a great deal of fun, but for working up loads for a small number of cartridges, it may have limited utility. If you anticipate working with an ever growing number of cartridges (and if you are not planning on a growing number of cartridges, just wait until some of the boys get finished "suggesting" what you need), then QuickLoad may be precisely the tool you need.

QuickLoad anticipates that you will use the "coolest" (least brisance) primer available when working up a load. Crimping will have some effect on chamber pressure, but it is not possible to compensate as crimps vary depending on the crimp itself. Seating depth can be compensated in the program, as can variations in chamber dimensions.

 

[SJB358]

QL is a great tool. I would rate it right up there with my Forster Coax and my chronograph for overall usefulness!

As Mike mentioned, the better the inputs, the better and more accurate the outputs. Once you get some time with it, it really is a great tool. Still, I bet I don't use more than 50% of the programs features. Still learning and I have had it a year and half.

 

[Woodycreek]

QL is scary accurate with more than a few of my rifles. I was surprised at how close it was with my 338-375 Ruger.

 

[RiverRider]

I find to be a great tool, and very educational.

I have found that the burn rate of my lot of H4831SC differs from the default value QL uses. It's no big deal and there is a way to deal with it.