reloading help... its not quite a funny one.

[Guest cookoff013]

ok,

i`ve got a load that i`m developing, there are few issues with it at the moment, but i`m in the need of some advice..

the load is completely off "piste" as it were. so this is a test load for proofing. so dont go on about reloading practices and whatnot.

 

my load wont fit in a 12gauge 3" case comfortably, it may be rto`d. but i`d like it crimped, the reason for this is its a "different powder" than one i`m generally used to. i`ve a new set of rules and criteria that must be met. one of them is it needs pressure to get the load going.

 

so, as the powder / wad / payload fits in the 3.5" case, but is too much mouth to crimp. i cant use a 4mm powder card under the wad, as the wad actually has a cupped obturator. i dont want to mess that up.

 

so, an option i have is to put a 12gauge powder card ontop of the wad, above the shot. so that there is no excess mouth to crimp.

this is actually a blessing because it can help my already awsome crimps and prove to help shot rusting. deeper crimps too.

 

here is the main question,

Q. will an obturator card disrupt the chronograph readings if it leaves the barrel first? these loads will be going for proof. so i am more interested in saving money, not having to go to a second and 3rd firing.

 

i`m more than happy for it to be there, as there is going to be a good 12-13000psi there. i`m even more than happy because the load will accomidate larger pellets.

 

i know the proofhouse fires through a test barrel and that the chrono has a shield with a hole in it. supposedly to stop fliers and wads.

 

will a OP card screw up the reading?

 

i`m also hoping as the 4mm OP card is "card" it will shred either in the forcing cone, or the pre choke / choke area, or be damaged enough to confetti away from the chrono. the shot column is large, so i`m not too concerened about pattern untill i get the pressure and speed.

 

what do you guys think? i`ve never even thought about it.

[deershooter]

The only thing this will do is bu@@er up your patten the shot will overtake the card and mess thing up thats why over shot cards are thin

 

thick cards over the shot is a no no

 

Read Climbing the north face of the .410 its a excellent book not just for .410 loading

 

 

Deershooter

Edited August 5, 2012 by deershooter

[Guest cookoff013]

The only thing this will do is bu@@er up your patten the shot will overtake the card and mess thing up thats why over shot cards are thin

 

thick cards over the shot is a no no

 

Read Climbing the north face of the .410 its a excellent book not just for .410 loading

 

 

Deershooter

 

i actually dont think it will bu@@er up the pattern, its like 5MM shot. not a tiny amount of #9s.

cheers for the info anyway, i`m kinda hoping the card gets shredded.

[Mick Shaw]

Hi Cookoff

I have tried between 1 and 2mm overshot cards in 12 gauge and settled on 1.8mm with roll turnover, 1mm was very low (plop) and 2mm was high (ouch) 4mm may cause extreme pressure so be very careful, and as deershooter said it may blow your pattern.

Mick.

[Guest cookoff013]

Hi Cookoff

I have tried between 1 and 2mm overshot cards in 12 gauge and settled on 1.8mm with roll turnover, 1mm was very low (plop) and 2mm was high (ouch) 4mm may cause extreme pressure so be very careful, and as deershooter said it may blow your pattern.

Mick.

 

the OP card has to be 4mm, but it also sits underneath the crimp. its for a steel reload and as its 3.5" and HP steel, i`ve a maximum of 1050BAR or 15000psi, so having high pressure issues is the last thing on my mind.

cheers for the help.

 

i`m more than likely to just load and analyse it. only doing it will tell me the answer.

[dipper]

i actually dont think it will bu@@er up the pattern, its like 5MM shot. not a tiny amount of #9s.

cheers for the info anyway, i`m kinda hoping the card gets shredded.

How about polystyrene or cork they should break up Dipper

[Guest cookoff013]

How about polystyrene or cork they should break up Dipper

 

hmm,

 

didnt think of that, cork !

[UK fowler]

soft cork disc as sold by siarm are what you need some loads of large steel pellets (4.75mm and 5mm ) have shot better patterns WITH the cork than without it some buckshot reloaders have found the same thing (check out DIXIE SLUGS) it should not work but in practice it does