400/350 reloads

30 November 2014, 10:57

cal pappas

Perhaps Graeme Wright's book would be the best place to start. Then, find the cordite charge and use 1.33X that with IMR 4831 and you are off and running.
If you need an excellent reference book for doubles I can recommend a good book for both beginners and advanced shooters alike.
I just closed the deal on a .350 no2 Rigby double and will be seeking the same data shortly.
Cheers,
Cal

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Cal Pappas, Willow, Alaska
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www.CalPappas.blogspot.com
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01 December 2014, 05:33

470Evans

The 400/360 uses the same case as the 400/350. I have used 52 - 54 grs of IMR 4350 depending on the lot in several 400/360s with 286 gr Woodleighs with excellent results.

It's great advice to reference Wright's book.

02 December 2014, 20:33

Tim Carney

Had a 350 Rigby No. 2 for a number of years. That is the "modern" evolution of the 400/350 and uses the same case but with a 225 grain bullet rather than the old 310 grain that has a more mortar-like trajectory.

My rifle was made by Gibbs, but I've examined a Rigby boxlock,and two Rigby bolt rifles that used a slanted magazine for the flanged 350 No.2 cartridge.

In my rifle (usual disclaimers) I could get decent regulation with plus or minus 55 grains of IMR4895. I also tried IMR 4350 at somewhat over 60 grains that seemed promising.

If your rifle is a double 400/350, EBob, and is regulated for the 310 gr bullet, the rule of 3/4 should have a 225 grain bullet regulate with the same charge of powder as for the 310. I believe you'll have trouble regulating a 250 grain bullet, but with doubles who knows

.

Regards, Tim

03 December 2014, 05:38

EngraverBob

Thanks guys that gives me a place to start
what I have is a new falling block Fraser rifle
it's not quite completed yet but I'm anxious to start shoot in it again thanks

03 December 2014, 05:45

EngraverBob

I forgot, one more thing
are you using a large rifle primer or large Magnum rifle primer

03 December 2014, 07:02

cal pappas

I've only used LRM primers for 25 years.
Cal

03 December 2014, 08:20

Jungleboy

Bob,

I have a falling block 400/350 Rigby. Extremely accurate & a pleasure to shoot.

I used Graeme Wright's book "Shooting the British Double Rifle" for developing

loads in most of my English doubles & have been very happy with the results.

My 400/350 Load Data:

Powder: 51 grains Reloader 15
(original cordite load (43 gr) x 1.19 = RL 15 load)
Bullet: Woodleigh 310 gr SN
Case: Bertram
Primer: Federal 215
Filler: Dacron

Again, this seems to work in my 110 yr old rifle quite well, shoots about 2050 ft/sec.