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Lading med 350 grs i 375 H&H Mag


villreinjegeren

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Fikk tak i noen ladedata på AR, etter et spørsmål fra meg på å lade 350 grs i 375H&H mag, her er resultatet:

 

350g Woodleigh PP 68g H4350 3.60" OAL (.100 freebore) 2260 fps 1.25" 3 shot groups 100 yards

350g Woodleigh PP 70g H4350 3.60" OAL (.100 freebore) 2310 fps 0.75" 3 shot groups 100 yards

350g Woodleigh PP 72g H4350 3.60" OAL (.100 freebore) 2360 fps 0.65" 3 shot groups 100 yards

 

All of these loads fed and extracted flawlessly, recoil at 72g H4350 was stouter than 300g factory loads but still very mild. 72g of H4350 will be my load for the 350g Woodleigh PPs, it may be too hot for your rifle so start up slowly.

 

 

Note: 72g of H4350 is MAX in my reloading manuals and proved so in my testing! I shot two more groups at 73, and 74g and this is NOT RECOMMENDED. Velocities exceeded 2500 fps, recoil got increasingly stout, extraction began to get a little sticky and the beginning of extractor marks appeared on the cases. I threw those cases away.

 

 

250g Swift A-Frame 69g IMR 4320 3.54" OAL (.50 freebore) 2710 fps 1.10" 3 shot groups 100 yards

250g Swift A-Frame 71g IMR 4320 3.54" OAL (.50 freebore) 2860 fps 0.90" 3 shot groups 100 yards

250g Swift A-Frame 73g IMR 4320 3.54" OAL (.50 freebore) 2910 fps 0.50" 3 shot groups 100 yards

 

All of these loads fed and extracted flawlessly. Recoil was very mild compared with 300g factory loads. The last 250g Swift A-Frame load with 73g IMR 4320 which is the stated MAX in the Swift reloading manual will be my Colorado elk, deer, bear hunting load.

 

IMR 4320 ligger mellom VVH 135 og N-140 eller mellom 203B og URP fra Norma

 

Fikk også ett ladetips med Hodgon 4350:

If you can get Hodgdon h4350 (ADI, AR2209) powder, we have had good results with 73grns at 2350fps but you should start with less powder for starters.

 

Dette kruttet ligger likt med N-150 og Norma URP.

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Fra min eget arkiv, for de som ikke vil "gå over bekken etter vann" :wink: :

 

 

 

Kaliber: .375

 

Projektil - fabrikat: Woodleigh

type: Weldcore

vekt: 350 grain

 

Patr.l/f.friflukt : 92mm

 

Hylse/tennh. : Norma / Fed215

 

Krutt - fabr./type : Norma 203B

ladevekt : 66,5 grain (5,6cc)

Hastighet : 717 ms / 2350 fps

 

Kommentarer : Maks/nær maks, presisjon 32mm/100m (snitt av tre treskudds serier)

 

 

NB: Kun skutt i norske sommertemperaturer!

 

Tron

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  • 2 years later...

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