H335- max load in .223 bolt action

[JDGray]

Loading 50gr bullets, I found data from 24grs H335 in my Speer Manual, to 26gr in another book, up to 28grs in Sierras bolt action load data. Quite a spread in Max load data! Anyone load H335 that hot? I havn't loaded hotter than 26gr, or seen any pressure signs. I had pretty decent group at 26gr, with some vertical stringing, and read a little more powder may be needed at that point, but that was my max load, and never pushed it higher.

 

[ArchAngelCD]

I load a 55gr Sierra bullet with 25.0gr H335. I'm thinking your load of 26.0gr under a 50gr bullet is just about right...

 

[X-Rap]

I use 25gr for 50 & 55 gr bullets in all brass and for all guns. It has been the best all around load I have found.

 

[dozernomore]

1-9 twist
hornady 50g V-max
25.3 gr-h335
hornady 7th edition list min21.8,,,,,,MAX 25.7

 

[JDGray]

Heres the Sierra data
http://accurateshooter.net/Downloads/sierra223rembolt.pdf

 

[280shooter]

I loaded and shot H335 27gr, and shot 1/8 group. No pressure signs, But I did back them down to 26 to see if I can still hold that size group.Im working with the noslers 50 gr,balistic tip. COL for my gun, is 2.250,that works for me..

 

[FM12]

I LOVE H335, use it like pepper on my taters!!

 

[Clark]

CAUTION: The following post includes loading data beyond currently published maximums for this cartridge. USE AT YOUR OWN RISK. Neither the writer, The High Road, nor the staff of THR assume any liability for any damage or injury resulting from use of this information.

Hodgdon website: 223 Rem, H335, 25.3 GR. 55 GR. SPR SP, 2.200", 24"
barrel, 3203 fps, 49,300 CUP

Test 8-19-2003: Ruger #1, CCI 400 small rifle primers, LC brass once fired
processed from Scharch and prepped by me, 55 gr Vmax moly, H335

pic left to right: unfired 27 gr, 28, 29, 30, and 31 gr.

unfired, extractor groove .329"
28 gr, extractor groove .329", 11% overload 69 kpsi
29 gr, extractor groove .329", 15% overload 80kpsi
30 gr, extractor groove .3295", 19% overload 92kpsi
31 gr, extractor groove .3320", 23% overload 106kpsi

What does it all mean?
The threshold of short brass life is between 29 and 30 gr.
In 1956 Vernon Speer said to back off 6% from that threshold for a usable load. 6% = ~1.8 gr

 

[JDGray]

Clark,

Thanks for the pictorial Looks like Sierra data is a little hot at 28gr, but with a 50gr bullet, maybe safe. Definatately hotter than I like to go!