28ga Fibre Recipes

[Spower]

Hi everyone, 

I'm just about to start reloading for the 28ga and looking to reload 21-24 gram fibre loads. Have seen the 70mm recipes stated on Folkestone Engineering which look perfect, only snagging point is the powder being PSB2+SP, I don't know anywhere that stocks it where I am (Sheffield). 

Clay&Game only state they have PSB2 on their website..

Just wondered if anyone knew of somewhere in South Yorkshire or surrounding area that stocks PSB2+SP or has a similar recipe using either PSB2 or similar economical powder? 

Thanks, 

Spower 

Edited August 20, 2019 by Spower

[hawkfanz]

why not pay a pound and get 28g reload data from clay n game,i use psb2 for 20g,but havent any data for 28g

Edited August 20, 2019 by hawkfanz

[Spower]

If I don't get any other advise that will be my next step I guess... 

[figgy]

Have you looked at Henry Kranks.

Load on Maxam site, 28 bore 21g shot G 1000 primer and 1.29 grams of SSB150 powder, cheap to buy compared to other powders. Should state other powders that are not Maxam. Maxam powders are about half the price of other makes.

Edited August 20, 2019 by figgy

[Spower]

Thanks for that Figgy. I'll have a look. 

[Guest cookoff013]

1 hour ago, figgy said:

Have you looked at Henry Kranks.

Load on Maxam site, 28 bore 21g shot G 1000 primer and 1.29 grams of SSB150 powder, cheap to buy compared to other powders. Should state other powders that are not Maxam. Maxam powders are about half the price of other makes.

 

Edited August 20, 2019 by cookoff013
re read post and it was less relevant

[figgy]

1 hour ago, cookoff013 said:

 

Come on Cookoff013 say it.

I garbled my post trying to say Maxam powders are cheapest to buy by half. Due mainly to the op stating a Maxam powder recipe and me forgetting.🙃

[Guest cookoff013]

i re read and though know ther is a 28gram lead load for the 28 gauge (which bluedot does with a fibre waderino)

[DoolinDalton]

Hi Spower. Give John at Folkstone Engineering a call and ask when he's next travelling up North, as he can arrange to drop off powders, shot, etc, at a suitable place, which for a few of us up here, is Scotch Corner.  I'll have a look for the PSB2 data as I've made some and also the 24 grm PSB2+SP. 

[Spower]

Thanks very much for that DoolinDalton. I'll give John a ring and see if he's heading up this way any time soon. 👍

[Continental Shooter]

Psb+2SP is slower than psb+2 and both are faster compared to the earlier sisters psb2 and psb2SP

[Guest cookoff013]

On 20/08/2019 at 12:34, figgy said:

Have you looked at Henry Kranks.

Load on Maxam site, 28 bore 21g shot G 1000 primer and 1.29 grams of SSB150 powder, cheap to buy compared to other powders. Should state other powders that are not Maxam. Maxam powders are about half the price of other makes.

 

i think this data is for steel shot, not lead shot.

[figgy]

Your right it will be for steel. Won't substituting the steel shot for lead work and lower the pressure.

Only other load listed on maxam for 28 bore is CSB5 and it's oy a 15g of shot load.

Edited September 3, 2019 by figgy

[Guest cookoff013]

Pressure is a funny thing really.

Which one fact overides in hard/ fast pressure rules? 

Dunno. Depends on powder and burn efficiency / space / compression.

When i did a test load with 32g niceshot in a compression wad, and a 32g of steel with the equivalent wad. The steel load just almost doubled in pressure. Thats what the compression section took care of. Efficiency of the 32g steel load was quite high and belted out more energy, but thats because it squeezed all the energy out of the identical charge (same powder charge and tuned up for 32g loads in 12gauge).

Im reallymake an effort to seriosly instil accurate info. Like hull length.

As compression section really changes everything. The 2 are connected.

Take the same powder and charge, compression wad, and put one and half ounces of HW13. And it almost passes cip 1050bar. failing Not by over pressure as the pressure was well within limits. The variability went nuts. I should have fired 10-20 shells to pass variability spec.

But that would be silly money.

These rules are not hard and fast. I created my own pilot load to test.

I had to create my own test data to do a prediction (screened it)

When i guessed i was within 30fps of guesses.

[figgy]

Volume for gas expansion on firing, makes sense with higher pressures if one has a compressible part to the wad and one doesn't. Pressure would rise. It's the types of shot that's always baffled me as 32g is 32g so if wads were the same shot type shouldn't matter if you can fit it in that is.

[Guest cookoff013]

the it seems the higher weight seems to slight hold alittle longer.

depending on powder type meaning extracting all the fast burning powder or extracting a fraction of the energy from a slower burning powder. 

with the differnt densities of shot means the volume the of space the gas can expand into can differ. but also increasing payload will have an increased effect.

the 2 shot types would be low density and high density. with an increase in either will have the same effect, increase in pressure. because the low density shot takes up more room in the hull it should increase pressures. more. and it does.

if you were to have a steel type tube wad and have 32g lead and 32g steel, it might make very little difference, because the expansion volume is the same. although the internal packers will be different.speeds might be comparable too. 

if i have a 65mm load and load up a 70mm shell in it by using a shorter wad, the pressures will increase. its been done by a guy here,

the opposite happens too. so is using a 70mm hull with a full height RTO, its like using a 3" hull with crimp. it has 6mm of extra expansion (as long as the wad is right)

what is really interesting is if you put a really slow burning powder A0 and maybe a tubo24 and 42g of hw13 should produce a boringly average shell really.

these slow powders are published to be used with static columns like 32g steel / 36g steel. restricting the expansion volume so that the powder burns right, but low enough to be within specifications (cip regs.)

with all the playtime i has with testing stuff, its becoming more and more aparrant, once the powder charge is in the right zone, you can really play with the payload.