Jamison Brass

Re: Jamison Brass

feeds@yuku.com (burkefj) — Wed, 24 Jun 2009 09:43:46 GMT

On my MH rounds, I'm using a 468 rcbs mold that drops bullets 20:1 at 535 grains and 469 unsized, I lube by hand since I don't have a 468 sizer(bore is 468),
I use 85 equivalent volume of pyrodex RS, with a half a cotton ball stuffed in, and a single .03 poly wad on top, to take up the extra space, I'm seating them out about 2-3 grooves so that the bullets are just touching the rifleing, as that gives me better performance than a slight jump.

since the neck is large...

Re: Jamison Brass

feeds@yuku.com (MIshooter) — Tue, 23 Jun 2009 08:30:04 GMT

Make sure it is 100% cotton, not the synthetic stuff the stores pass off as cosmetic puffs. The medical Rx stuff is cotton and can be found in almost any store carrying medical supplies.

Re: Jamison Brass

feeds@yuku.com (The Double D) — Mon, 22 Jun 2009 17:50:37 GMT

The Double D wrote:
Mike,

Over the top of that put 3 grains of kapok, dacron, carded sheeps wool or cotton.

Yep thats what I said.

Re: Jamison Brass

feeds@yuku.com (linus9) — Mon, 22 Jun 2009 16:51:16 GMT

in stead of kapoc can i just use cotton?

mike

Re: Jamison Brass

feeds@yuku.com (The Double D) — Mon, 22 Jun 2009 12:22:43 GMT

Not a silly question at all, if you don't know what it is.

It's the fluffy fibers from the seed pod of the kapok tree. http://en.wikipedia.org/wiki/Kapok

Here's 303SMLE standing by a Kapok Tree at the Botanical Gardens in Durban.

Re: Jamison Brass

feeds@yuku.com (linus9) — Mon, 22 Jun 2009 11:54:00 GMT

im sorry, silly question, but what is kapok?

thanks, mike

Re: Jamison Brass

feeds@yuku.com (gcrank1) — Mon, 22 Jun 2009 11:31:38 GMT

Regarding seating primers: Is there some kind of a depth stop built into that tool that could be keeping you
from getting a 'full seat'. I had to modify another brand by a little judicious filing to solve the same problem.

Re: Jamison Brass

feeds@yuku.com (The Double D) — Mon, 22 Jun 2009 11:27:27 GMT

Mike,

This is a bottleneck British cartridge and loading technique is different than with American straightwall cases. First to start, load 85 grains of Fg. Over the top of that put 3 grains of kapok, dacron, carded sheeps wool or cotton. This will fill the air space and will need to be compressed in the case with a dowel or pencil. Next put your wonder wad and seat it to the bottom of the neck. Ad two card thin card wads. Next you need a bullet of the correct size. Your .459 bullet...

Re: Jamison Brass

feeds@yuku.com (linus9) — Mon, 22 Jun 2009 08:58:54 GMT

im having trouble with jamison brass too, but mine want to hold too much powder. i need to put in close to 95 grains to get close enough to the bullet and not leave an air space. im using 525 grain .459 made from the saeco 1881 mold and a wonder wad. do any martini reloaders have any advice?

thanks, mike

Re: Jamison Brass

feeds@yuku.com (JB White) — Wed, 20 May 2009 06:46:14 GMT

I thumb load the 577 Snider as well. It took a couple of firings and a trim before the all the cases chambered and extracted smoothly. Hopefully you get similar results after the next time out.

My loads are 70 gr of APP, wool wad, MC card, and a Lee Liquid Alox lubed .600 round ball. Deadly on wild soda cans and marauding water filled plastic jugs inside 100 yards. That's exactly what I wanted for a casual days shooting so I'm pleased.

Re: Jamison Brass

feeds@yuku.com (The Arctic Fox) — Tue, 19 May 2009 07:15:56 GMT

I just shot some 577 Snider re loads. The new Jamison brass I needed to expand a couple thou. to take the lead. On a few rds. I expanded too much and unable to chamber, but most were not a problem .
However on every rd. I had to give the block a light tap to close on the loaded cartridges.
I only used 40 gr. of FF, and 345 g lead slugs. Brass shows no sign of cracking, primers unmoved, extracted very smooth and the 2 band Sgts Mk II** looks like it can handle a whole lot more.
...

Re: Jamison Brass

feeds@yuku.com (Todd Birch) — Mon, 04 May 2009 15:58:16 GMT

Britarms

Yes, that is a solution for a non-existent press problem, when the crux of the problem lies with the expander plug die. The cost of the die set should guarantee satisfactory function.
I emailed CH-4D today - no reply as yet. I'll call tomorrow and speak to someone with a pulse.

Re: Jamison Brass

feeds@yuku.com (britarms) — Mon, 04 May 2009 07:29:18 GMT

The other thing you can do, Todd is come up with some method of limting your press travel. I've been thinking about making a collar that fits around the ram underneath the press so it can't extend as far into the throat area.

Re: Jamison Brass

feeds@yuku.com (Todd Birch) — Sun, 03 May 2009 18:26:32 GMT

britarms

I thought about it after your last post and realized that it was the plug length causing the problem. There is no die body per se, only the plug and locking ring.
It's too long and needs shortening to allow more travel for the flare to happen at the top of the stroke. A simple operation if one had a lathe .....
I'll contact CH-4D and see about an exchange or replacement.

Re: Jamison Brass

feeds@yuku.com (britarms) — Sun, 03 May 2009 17:10:35 GMT

You need to expand new Snider brass to accept a bullet, that's as far as I've gotten with Snider reloading. Todd, I'm sorry if I misunderstood the cartridge you were talking about, it's my Martini dies that I have issues with, and it's the body you can get longer, not the plug. The longer die body allows you to raise the plug higher, and thus adjust the neck flare to coincide with the top of your press stroke.

Re: Jamison Brass

feeds@yuku.com (martinibelgian) — Sun, 03 May 2009 09:57:30 GMT

FWIW,

I am having excellent results in 577-450 with 80-85grs of Swiss Fg in Drawn brass, which leaves air space in the assembled cartridge. My rifle probably doesn't know it's supposed to blow up with such a load... Bottom line, it works, shoots accurately and presents no problems. However, I wouldn't go below 70% fill with BP.

Re: Jamison Brass

feeds@yuku.com (Todd Birch) — Sun, 03 May 2009 08:03:17 GMT

britarms

Thanks for the tip! I'll contact CH-4D about a longer expander plug. It will be one less aggravation in reloading.

Fred

I do not understand reloading for ANY cartridge without the use of dies! Things like uniformity and quality control come to mind.
There is also no need to fill cases to capacity other than to simulate original loadings, which we are NOT doing with modern balloon headed cases like CBC or solid head like the Jamison. Original...

Re: Jamison Brass

feeds@yuku.com (Fred) — Sun, 03 May 2009 06:17:36 GMT

I still do not understand why dies are needed for a Snider. If whatever load you are using fills up the space, simply stick a Minie ball on top of it. When chambered, the relationship of the Minie to the bore is exactly as it would be in the Enfield before conversion.

Re: Jamison Brass

feeds@yuku.com (britarms) — Sat, 02 May 2009 20:39:12 GMT

Hi Todd. I have the same problem with my CH-4D expander die; the die body isn't nearly long enough, so you can't back it out far enough to properly set your neck flare. They make different lengths of expander die bodies that you can buy seperately, but I don't know why they can't sell you the right one to begin with.

Re: Jamison Brass

feeds@yuku.com (Todd Birch) — Tue, 21 Apr 2009 07:52:21 GMT

Guys

I'm loading for the 577 Snider using .590FB bullets, a commercial product, until I start casting my own. I'm sizing them and lubing them with SPG.

Having been a reloader since the early '70s, I have a fair idea about what I'm doing with the 577 Snider, just as I do with any other BPCR I load for. Not to mention experience with the .270, .30-'06, 6mm. .243, .222 and a host of pistol calibres.

I'm not overly impressed with this Jamison...

Jamison Brass

feeds@yuku.com (Todd Birch) — Sat, 18 Apr 2009 15:47:54 GMT

Now that I have the proper shell holder for my expensive Jamison brass, I'm distressed to find out that I cannot seat primers with my RCBS benchrest priming tool! They are standing proud by several thou. Tapping them with a raw hide mallet on a wooden surface with a mandrel inside the case is giving me the creeps.

I've tried both Winchester large rifle and pistol primers as well as Federal. That doesn't seem to be the answer.

Thinking that perhaps the pockets...