H335 for 308

[swcFL]

Hello all,

anyone have experience with a good start load for H335 in a 308?

Just ran my first reloads with IMR 4064 and it was not that smooth running through my RCBS powder measure. I have run a bunch of H335 for my AR with good results.

Sorry if this has been touched on but did not get any hits on the search function.

thx,

 

[bohem]

Re: H335 for 308

Works well for 110-150gr bullets, and starts to taper off in effectiveness around 145gr; it is too fast for really using in a 308 on heavier bullet weights than that.

Yes it can work, but it is far from optimal.

It is also somewhat temperature sensitive.

 

[Clark]

Re: H335 for 308

My 11-23-2003 test of H335 in a 308

Hodgdon max book load:
308 WINCHESTER, CASE: WINCHESTER, BBL: 24", PR: FEDERAL 210M, 168 GR. SIE HPBT COL: 2.800" H335, 42.0 gr., 2631 fps, 49,300 CUP

My test:
Pacific .308 Win reamer, VZ24 trued action, A&B fluted stainless 24" F54 barrel, H335, CCI200 primer, 2.9" OAL, Speer 168 gr. HPBT Gold Match, brass: Win308Win:

0) 42 gr. QL= 2565 fps & 46 kpsi, 0% overload, did not load 42 gr.
1) 43 gr. QL= 2618 fps & 49 kpsi, 2% overload, ok
2) 44 gr. QL= 2670 fps & 52 kpsi, 5% overload, cratered primer this and higher
3) 45 gr. QL= 2722 fps & 56 kpsi, 7% overload
4) 46 gr. QL= 2774 fps & 60 kpsi, 10% overload
5) 47 gr. QL= 2825 fps & 64 kpsi, 12% overload
6) 48 gr. QL= 2875 fps & 68 kpsi, 14% overload, mark on brass from bolt face extractor this and higher,
7) 49 gr. QL= 2925 fps & 73 kpsi, 17% overload
8) 50 gr. QL= 2974 fps & 78 kpsi, 19% overload, extractor cut on brass expands .0020"
9) 51 gr. QL= 3024 fps & 84 kpsi, 21% overload, extractor cut on brass expands .0020"
10) 52 gr. QL= 3073 fps & 90 kpsi, 24% overload, extractor cut on brass expands .0110", primer fell out,

 

[JGorski]

Re: H335 for 308

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: bohem</div><div class="ubbcode-body">Works well for 110-150gr bullets, and starts to taper off in effectiveness around 145gr; it is too fast for really using in a 308 on heavier bullet weights than that.

Yes it can work, but it is far from optimal.

It is also somewhat temperature sensitive. </div></div>
If you want a powder that flows well try Benchmark for the lighter stuff, RE15 will work very well for the heavier bullets, and flows thru a measure pretty well. H335 is a very dirty powder.

 

[FLIGHT762]

Re: H335 for 308

I've used H-335 in the 308 Winchester for 35 years. It works well in 150 to 168 bullet weights. If you are going to buy some surplus WC844 ( H-335) at a good price; $90.00 - $100.00 for 8 pounds, then buy it, use it. If you are going to buy new canister 1# or 8# at retail prices, I would go with one of the newer less temperature sensitive powders. Benchmark, IMR 8208 XBR and Varget are all made by ADI in Austrailia and are less temperature sensitive. Canister H-335 retails at about the same price as the others.

Benchmark and 8208 meter nearly as well as H-335 and can be used well in both the 223 and 308 where Varget is a bit slower and is better suited to the 308 and for the 223 with heavier bullets. I really like Benchmark and 8208XBR.

 

[Deadshot2]

Re: H335 for 308

Varget gets my vote for .308 using 168 or 175 gr bullets. Tried H-335 and was less than satisfied with performance when compared to the Varget loads.

 

[swcFL]

Re: H335 for 308

Thanks all for the very informative replies! I think I will look to other powders to get better throw consistency.
Sam

 

[jdmartin]

Re: H335 for 308

As mentioned by FLIGHT762 above, H335 is basicly WC844 which is a military powder for 223.If you go to WC846 you will find a more suitable 308 powder which throws just like H335,costs $94 for 8 lbs at Pat's Reloading. I find it to be just a little hotter than BLC2.Great barrel life. I use 41.5gr with 155 smk's for a plinking load that shoots great for me.I think 42-43 gr is usual for 150 ball in mil brass.
Like H335, it is reported to be heat sensitive,but loads I worked up at 100 degrees are working well in the current 60-80 temps here in E.Texas.
Here is a link to a discussion about WC844 and WC846.
http://www.223reloads.com/home/223-5-56-info/223-5-56-reloading/wc-846-loads