fiocchi hulls

Post your 20 Gauge pattern results.

Moderator: hawglips

Greg
Posts: 47
Joined: Fri May 31, 2019 7:25 am

fiocchi hulls

Postby Greg » Sat Jan 23, 2021 7:12 am

So I have been loading several types of tss loads with the 2 3/4 in hull with the 16mm brass. When supplies got short all I could get was the 8mm brass. The exact same load now seems to be way over pressured. Does anyone have any experience with this?



paulinkansas
Posts: 147
Joined: Fri Mar 11, 2016 11:28 am

Re: fiocchi hulls

Postby paulinkansas » Sat Jan 23, 2021 11:34 am

Fiocchi has a 615 and a 616 primer. Perchance the different primers are in the different hulls. You now have a hotter primer. Have you run the new shells over a chrono to see if the velocity is higher than the previous shells?



Dave in AZ
Posts: 205
Joined: Thu Mar 10, 2016 1:38 pm

Re: fiocchi hulls

Postby Dave in AZ » Sat Jan 23, 2021 12:23 pm

What Paul said. The 3in 12ga hulls are now coming with the mag primer, maybe your 8mm 20ga did too if you got them primed?

Also, how do you know it is overpressured? Hull separating? Stuck in chamber? Brass ripped? Chrono?
Thx



Greg
Posts: 47
Joined: Fri May 31, 2019 7:25 am

Re: fiocchi hulls

Postby Greg » Sun Jan 24, 2021 5:41 am

I did receive them primed. Hulls were seperating, sticking in the chamber, and even damaged the bolt on an 1187. Never ran one over a chrono as I only shot 3 and was afraid it cause Serious problems.



hawglips
Posts: 485
Joined: Fri Feb 19, 2016 4:56 pm

Re: fiocchi hulls

Postby hawglips » Mon Jan 25, 2021 12:11 pm

Greg wrote:I did receive them primed. Hulls were seperating, sticking in the chamber, and even damaged the bolt on an 1187. Never ran one over a chrono as I only shot 3 and was afraid it cause Serious problems.


This is a possible problem:


"HOT LOADS & AUTOMATIC ACTIONS
A load may appear to be "hot" or have high a pressure when fired through an automatic-action shotgun. A shotshell may become a damaged hull. This may NOT be due to high pressure.
The engineering of the automatic action requires a gas port. The gas port bleeds back some of the hot gases (pressures) produced by the burning powder. These gases help operate the bolt action in the receiver – to eject and reload the next shell. The diameter (size of the opening in the gas port) is determined at the factory. The gas port diameter is set I size for a particular type of shotshell.

Years ago, narrow ports were set for lead loads. Today the gas port is set for steel loads. The gas port is larger to allow greater flow.

Recoil (setback) is also a function of shotgun automatic actions. Setback assists the ejection of the fired shell in coordination with the gas port moving a piston or twisting a cam to unlock the bolt and ejecting the fired shell.

When an automatic shotgun (which is manufactured for steel loads) is used for lead loads, HeviShot™ loads or any other shot heavier than steel pellets… the combination of increased recoil (setback) from the heavier load and the rush of pressure down the gas port – overwhelms the automatic action. The hull may become damaged owning to the premature opening of the action. (Lingering internal barrel pressures or because of the aggressive thumping of the action.) Damage to the action is a possibility.

Your Solution:
Carefully read the handbook provided by the shotgun’s manufacturer. They often warn the owner to only use steel loads in automatic shotguns. (Because the shotgun was designed for steel loads.) Problems increase when the shotgun has 10-gauge or 12-gauge 3-1/2" chamber.

If the shooter wishes to fire differing shot types - anything heavier than steel shot – the solution is to purchase a pump action. With the exception of steel shot being used, any heavy field automatic-action shotgun may fail to operate "normally." A pump action is a better choice for shotshell change-ups. Pumps operate with any type of shot or weight of load.

The Reloading Curmudgeon"



Greg
Posts: 47
Joined: Fri May 31, 2019 7:25 am

Re: fiocchi hulls

Postby Greg » Mon Jan 25, 2021 12:38 pm

Tried one in an 870 locked the action up and had to beat it on the ground to get it to extract. Brass looked noticably swollen.




Return to “20 Gauge”

Who is online

Users browsing this forum: No registered users and 0 guests