[sean eady]

Does anyone have data for a 40 grain v-max/z-max or comparable using W-748? Thank you.

[rcmodel]

The Hornady reloading manual does I think. I'll check.
No, they don't.

Hodgdon?
No, they don't either.

O.K. Lyman #49 has it then?
Nope!

Hmmmm?
Maybe W-748 isn't a good powder for a 40 grain bullet.
Or maybe a 40 grain bullet isn't a good bullet for the .223?

So many questions, so few answers.

rc

[sean eady]

Just trying to see what people have tried. I have searched and found people having good results from 26-29 grains. Only reason I am lookiing for this combo is that I have stopped reloading for 5.7 and have a few thousand 40 grain z-max projectiles and a ton of w-748. Thanks anyway for looking.

[rcmodel]

Well, Lyman #49 shows W-748 with a 45 grain Sierra.

27.0 is Start.

30.0 is MAX.
Pressure is only 47,600 PSI.

You could try that with a 40 I think.

rc

[A-FIXER]

Ok here is the low down on your desire on the newest Hornady #8
40 gr
sectional density 0.114
diameter 0.224''

#22241 V-MAX
B.C. 0.200
C.O.L. 2.200

VELOCITY FPS

POWDER 3300 3400 3500 3600 3700 3800

IMR-4198 19.3 20.0 20.7 21.5 22.2 ----
VIHT N-120 19.5 20.3 21.0 ---- ---- ----
VIHT N-130 21.6 22.3 23.0 23.8 24.5 ----
RL-10X 23.0 23.6 24.1 24.6 25.2 ----
A2460 21,4 24,9 25.6 26.4 27.1 27.8
H 335 24.3 25.1 25.9 26.6 27.4 ----
TAC 24.3 25.1 25.9 26.7 27.5 ----
BENCHMARK 24.7 25.6 26.4 ---- ---- ----
8208 XBR 26.2 26.7 27.0 ---- ---- ----

And of course these are MIN TO MAX
its the best info I can give to assist.
A-FIXER

[parisite]

Try the 26.0gr of 748 they list for a 50gr bullet. I bet it will work fine for you.

40gr bullets are the cat's meow in my 14" Contender barrel.

[sean eady]

Thanks everyone.

[A-FIXER]

Ok looking into my old manuals in the hornady vol#1 it states for a 45gr hornet as follows


#2230 Hornet
ballistic coefficent-.202
col-2.200
sectonal density-.128
diam-.224

Win748
3100 3200 3300 3400 3500------fps
25.5 26.5 27.5 28.6 ----

It reads
In our test rifle, the best accuracy and uniformity throughout the range of hornady bullets was obtaied with W748 and IMR4198 note; when using a 223 with rapid twist barrels (As in the ruger ini-14 or Colts AR-15A2) DO NOT USE SX bullets. The rapid twist can cause these fragile bullets to come apart in flight, especially at maxmium velocities. However, the 68gr BTHP Match bullet requires a fast twist to fully stabilize it in flight. A 1 in 10'' twist or faster is required. The 68 gr data was fired in a Colt AR-15A2 with a 1 in 7'' twist rate and a 20'' barrel. Also, some manufactures of semiautomatic firearms recomend the use of a crimped bullet to reduce the chance of the cycling of the action pushing a bullet deeper into the case and accordingly increasing pressures.

[hindmarsh]

With 40 grainers and W748, work your way up to 28.0 grains in .2 or .3 grain increments. 28 grains has been a pretty consistent performer with OAL adjustments to fine tune it.

[ssyoumans]

I use to run 27.0gr of W748 with CCI 450 SR Magnum primers, 40gr VMax, 2.200". These ran 3177 fps out of my 16" M&P.

By way of comparison, Fiochhi 40gr VMax factory ammo ran 3353fps out of the same rifle.