303 Brit data

[soonerfan66]

Not finding much data on 303 Brit 160-165 gr gas checked bullet . I have great results with IMR4895 but also got I 4064 , H4360 , I 4198 , I 3031 , A 2520, H335 , N140 to pick from . But 4895 and the 4064 are my favorite ones .

[beemer]

I have shot IMR 4064 in the 303 but found it works better with jacketed than cast. IMR 4198 if one of my favorites, I use around 20 grains and a dacron filler for that weight range.

Dave

[soonerfan66]

I have never used any filler except if loading Black powder cartridges this would be pretty new for me in that area .

[Thumbcocker]

25 of imr 4198 with a 180 grain boolit has shown promise for me.

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[soonerfan66]

25 of imr 4198 with a 180 grain boolit has shown promise for me.

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Did you use any filler with your load ? I have been casting for Black powder cartridges and front stuffers for quite awhile and just couple years getting to doing it for my smokeless stuff . I know some smokeless powders do fill a case more then others but right know as we all know it can be pretty hit and miss as to what's on the shelf if any !!!!

[Bad Ass Wallace]

28.5gn of 3031 with a 190gn cast boolit (P14) produced this 100yd group. For my 1901 vintage LE's I reduced the load to 26gns. The 303 rifles have twists of 1:10 and are more suited to the heavier boolits1

https://i.imgur.com/K1Eu3Ool.jpg

https://i.imgur.com/ecTTkwil.jpg

[soonerfan66]

I forgot to say I am shooting a No4 Mk1 Longbranch . I get real good accuracy so far with 150gr soft point / .311" and also 180gr FMJ pulled bullets / .312" . Seems even with the factory stuff I bought before started reloading it shot good . My 1905 Ross is another matter . Over the counter ammo it hated . Needed a bigger bullet . It shoots good but can't remember the load I have for it but it is not the same as for my Longbranch

[Thumbcocker]

No filler.

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[brassrat]

Mk111 of 1917. Had it for a long time. Plastic sporting stock and Williams ghost thingy with a high vis front. A total bubbajob but good on small or larger plates at 100yds. 11.8 gr of Unique and great 180gr. ? from a boollet guy that sells in a LGS. Lucky for me.