Powder for .303

[Gerry939]

Can anyone suggest a good powder to use when reloading .303, I have H4350 for my 6.5creedmoor, is this this any good for .303 British

[snayperskaya]

How about Vihtavuori N140 or Ramshot Big Game?, used both to reload 7.62x54r with good results.

[dromia]

I prefer Vihtavuori N140 in the 303, slightly faster than H4350.

Hodgdon do list .303 loads for H4350 and this should be your first port of call for data.

[Laurie]

Speer used to list the 4350s in 303 with its 180gn bullets years ago. I found that the case wouldn't hold the starting load never mind anything heavier.

N140 is probably the most widely used 303 powder here. Reload Swiss RS50, H4895, IMR-3031 / 4064 / 4895, Lovex SO62, Ramshot Tac are all suitable.

[ukrifleman]

I suggest that you look at the powder manufacturers load data and match it to your available powder.
ukrifleman

[bnz41]

I use H4895 in my .303's with excellent results, can be hard to find at some RFD's

Using 174gr Sierra Matchkings HPBT.

[Alpha1]

41 grains of N140 works for me behind a 174grain flat base bullet.

[Mike95]

I am told that 3031 was designed for use in the 303.....I have used it in 308 and 7.5x55, 30/30, and even the .222. Seems to be a very adaptable powder.

Mike95

[ovenpaa]

I used N140 for years and moved to TR140 (RS50) which is a tad slower. It gives good accuracy and repeatability.

[Laurie]

I am told that 3031 was designed for use in the 303.....I have used it in 308 and 7.5x55, 30/30, and even the .222. Seems to be a very adaptable powder.

Mike95

Whilst IMR-3031 is an excellent powder for the 303, it wan't designed specially for this cartridge. It was the US .30-30WCF it was developed for. At the time the powder was introduced (1934), the little 30-30 was still one of America's most popular sporting cartridges.