Quick Load help...

[KYCaster]

Would somebody with Quick Load please do some calculations for me?

Cartridge..................308 Win
Boolit.........................312 dia. FP W/GC bore rider
Weight of boolit...195 gr.
Length of boolit....1.013
COAL.........................2.625
Powder......................Alliant Reloader 17


The gun is a commercial Mauser 98 built for Montgomery Wards. The barrel is 22" with 14 twist micro-groove rifling. I have a Norinco 3-9X40 scope on it.(the whole rig cost less than a current copy of Quick Load ;) )

I'd like to get 2400 fps with this boolit. I started at 36 gr. (1920 fps) and have worked up to 38 gr. (2040 fps). So far results look very promising...some very low SD's and groups as good as any I've had with this rifle.

But.........I'm working in uncharted territory for me and I'd like to get a bit more info before I hurt myself.

So, what I want to know is........

What's the pressure of my 38 gr. load?
What powder charge will give me 2200 fps and what will the pressure be?
Ditto 2400 fps.
It looks like 100% load density will be 42 gr., what velocity and pressure can I expect with that load?


Here's the best group so far with this boolit....as a matter of fact the best group ever with this gun! But then, one three shot group doesn't mean much.

35731

I really appreciate any help you can give me.

Jerry

[kelbro]

Here you go...

Pretty close correlation to your numbers.

Looks like a little over 40gr for 2200fps and 44ish for 2400fps.

Cartridge : .308 Win.
Bullet : ?? .308, 190, LYM LSp GC 311334
Cartridge O.A.L. L6: 2.625 inch or 66.68 mm
Barrel Length : 22.0 inch or 558.8 mm
Powder : Alliant Reloder-17

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 Grains Vel. fps Energy ft.lbs Pmax psi Pmuz psi Prop.Burnt % B_Time ms


-20.0 68 32.00 1709 1265 18169 5588 80.6 1.949
-18.0 70 32.80 1754 1332 19341 5819 82.3 1.891
-16.0 72 33.60 1800 1402 20578 6048 83.8 1.834
-14.0 73 34.40 1845 1474 21884 6273 85.4 1.780
-12.0 75 35.20 1891 1549 23263 6495 86.8 1.728
-10.0 77 36.00 1937 1625 24723 6712 88.2 1.679
-08.0 79 36.80 1983 1703 26261 6925 89.5 1.631
-06.0 80 37.60 2029 1783 27890 7131 90.8 1.585
-04.0 82 38.40 2075 1864 29610 7331 91.9 1.541
-02.0 84 39.20 2121 1948 31429 7524 93.0 1.498
+00.0 85 40.00 2167 2033 33352 7709 94.0 1.457
+02.0 87 40.80 2213 2120 35387 7886 95.0 1.418
+04.0 89 41.60 2258 2209 37544 8054 95.8 1.380
+06.0 91 42.40 2304 2299 39826 8213 96.6 1.343
+08.0 92 43.20 2350 2390 42245 8362 97.3 1.307
+10.0 94 44.00 2395 2483 44811 8500 97.9 1.273

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 85 40.00 2301 2293 39991 7861 99.1 1.342
Data for burning rate decreased by 10% relative to nominal value:
-Ba 85 40.00 1998 1728 27347 7099 84.5 1.603

[williamwaco]

Here's the best group so far with this boolit....as a matter of fact the best group ever with this gun! But then, one three shot group doesn't mean much.

Jerry

Maybe not.

BUT IT SURE DOES FEEL GOOD! DON'T IT?

[KYCaster]

Thanks Kelbro. That's exactly what I was looking for. I'll work up to 40.5 gr. tomorrow then decide if I want to go any further.


Yes William, it feels VERY good. :cast_boolits:


Jerry