Since I shoot a 6XC and H4350 does great service with 107 grainers, I thought that I would tinker with success and subject myself to YAP (yet another powder) to try. Got the Hybrid, which is slower than 4350 but faster than 4831.

Results: Bullet = Sierra 107 Matchking copper (not moly), LC military case, WSR primed, just off lands, temp 35 degrees f, Kreiger 28" stainless, 1:8 twist, Rem 700 action.
Using Hybrid powder (OK, first I worked it up carefully) I got the following:

Weight Velocity
37.0 = 2813 fps (H4350 = 2691 fps, moly bullet)
38.0 = 2891 fps (H4350 @ 38.1 = 2833 fps))
39.0 = 2980 fps (This is max load for me and H4350, and gives ~ 2900 fps)
40.0 = 3052 fps
41.0 = 3101 fps (slightly sticky bolt lift)

So, gives greater velocity. No primer or case deformities. Next step is dropping down to 40.0 and seeing how the accuracy goes. The whole point of more velocity is for long range performance.

Anyone else tried Hybrid? Seems that it may have a place in the .243 with heavier bullets as well. I'm going to test with 100 grain Sierras next.

Good shootin'

Flinch

Er...DUH...not "Military Case", should read Winchester case. Was looking at 223 data entry.

Flinch

Try dropping back .5 you may pull it off there. Are you testing your CUP/PSI?

Your the first person I heard talking about jumping 1gr when load testing.
Personally, how I find my load is to start low and work up moving .3 to .5 GR at a time. Until I find a bullet powder combo that works best. After that I start looking at different primers to tighten my groups even more. I also think this is the best part of hand loading is trying to find what works. I also do each test in lost of 20 to 50. Spend the after noon trying that particular load.
Here is some load data off of the Hodgon web page. The heaviest bullet I see listed are 107.
WWW.HODGON.COM

80 GR. SIE BTSP Hodgdon Hybrid 100V .243" 2.600" 41.0 3072 40,100 CUP 45.0C 3330 48,400 CUP
85 GR. BAR TSX Hodgdon Hybrid 100V .243" 2.620" 40.0 2990 41,900 CUP 44.0C 3259 48,900 CUP
90 GR. SPR SP Hodgdon Hybrid 100V .243" 2.625" 40.0 2934 43,000 CUP 44.0C 3204 50,100 CUP
95 GR. NOS PART Hodgdon Hybrid 100V .243" 2.650" 39.0 2866 42,200 CUP 43.0C 3113 50,200 CUP
100 GR. SPR BTSP Hodgdon Hybrid 100V .243" 2.650" 40.0 2868 45,400 CUP 43.7C 3100 51,700 CUP
105 GR. HDY A-MAX Hodgdon Hybrid 100V .243" 2.760" 37.0 2721 43,800 CUP 41.0C 2959 49,300 CUP
107 GR. SIE BTHP Hodgdon Hybrid 100V .243" 2.850" 38.0 2760 45,300 CUP 41.5C 2957 50,900 CUP
The smallest I shoot is 6.5x55
Be Safe and best of luck, I will look in to the powder myself!

Hope this info helps you and I m not a pain in the backside.

Oh and I am NOT by any means a EXPERT!

Just sharing my experience with people hoping to gain knowledge and to help others in the same hobby's/fields.

Thanks,

<< "...first I worked it up carefully" >>

Actually, the listed loads were results of testing at intermediate step ups in powder charges. Listing all umpty dozen loads (since I am typing lazy!) seemed like a lot of work :>

Also, Hybrid was tested with lighter bullets, but as expected the faster 4895/varget/benchmark still rules there.

Not included were tests of H4831SC - too slow and gave pressure signs before the same velocities as 4350, even with Berger 115 grain bullets.

I don't have a .243 that will handle heavier bullets (too slow twist on mine) so no way of testing vs Hodgon loads.

Regards,

Flinch

quote:

Originally posted by NV_Flinch:
Thanks,

<< "...first I worked it up carefully" >>

Actually, the listed loads were results of testing at intermediate step ups in powder charges. Listing all umpty dozen loads (since I am typing lazy!) seemed like a lot of work :>

Also, Hybrid was tested with lighter bullets, but as expected the faster 4895/varget/benchmark still rules there.

Not included were tests of H4831SC - too slow and gave pressure signs before the same velocities as 4350, even with Berger 115 grain bullets.

I don't have a .243 that will handle heavier bullets (too slow twist on mine) so no way of testing vs Hodgon loads.

Regards,

Flinch

Cool let us know how it turns out