What distributor or dealer has 2 1/2" 20 ga. Target loads , 8 or 9 shot 3/4 or 7/8 oz? Who has best price?
Need several flats.
I see RST and Polywad show them. B&P doesn't. any ideas, input?

need them for my recently restocked C grade Sterlingworth done by Dan Rossiter.
Photos will be posted in the upcoming week or so.

Give RST a call, they will deliver to your door.

http://www.rstshells.com/store/m/4-20-Gauge.aspx

except in NEW YORK

I am an FFL Dealer also

anyone know if these are light loads. My 20 Ga Fox has 2 1/2" chambers. I don't want to beat it up.
FIOCCHI AMMO 20ga LITEd 3/4oz 1075fps #7.5 250/cs

Item Number: FC20LITE75

The standard 20ga skeet load of 7/8 ounce @1200 fps generates 14 ft-lbs of free recoil energy in a 6 lb gun.

A load of 3/4 ounce @ 1075 will generate 9 ft-lbs in the same gun.

At 2/3 the recoil energy, I'd say that's the definition of a "light" load.

Pressure is immaterial. Let me say that another way....whether it's 11,500 psi or 5,500 psi doesn't make one iota of difference to the gun. If anyone is inclined to disagree, I'd like to hear the hear the scientific argument.

Mike, if pressure is immaterial, why bother with overpressure loads at the proofhouses . . . or at the ammo makers here in the US?

Brian, 3/4 oz loads at speeds around 1100 fps are really nice to shoot in light 20's.

That the best you can do, Larry?

A little sophomoric to take "immaterial" out of context, even though I qualified it.

I think that maybe Mike meant that pressure is immaterial to recoil, because it is.

Recoil is the force generated as the reaction to launching X payload weight at X velocity from a gun of X weight.

Chamber pressure and velocity do not directly correlate.

While we're at it, let's put that "high brass" and "low brass" crap to rest also. No correlation to chamber pressure whatsoever.

There are plenty of light loads that generate higher chamber pressures than you might imagine.

Noble Sport makes a 3/4 oz 20b load. Last ones I bought were $58/flat. Hardly any recoil, but re pressure, I'm not sure. They are 70mm shells, but I'm guessing they wouldn't be a problem in your gun.

Try that 11,500 psi down where the barrel walls are .025" thick & then tell me it doesn't make any difference.
In the context of which "I Think" you meant it I agree, it doesn't matter.

my concern isn't recoil. It is the beating the gun takes.
I understand recoil is a factor specially when it comes to the wood standing up.
I just want to go easy on the gun. I am not afraid of a blow up or anything else. I have been at this for a while myself . I wanted technical input on operating pressures.
looking for whatever is similar to the RST lites in 2 1/2" without the cost. I don't handload at this time.

Mike, your words. You didn't say that pressure was immaterial "in a different way". You said something almost totally different, referring to SPECIFIC pressure levels. If you'd left off that first sentence, I wouldn't have bothered responding. I doubt 11,500 psi chamber pressure would do anything bad to a Fox, assuming good condition.

Brian, RST will provide pressures if you ask them. Not sure about Fiocchi, but doubtful a load that light and at that velocity would present a pressure issue for your gun. I'd guess well below standard SAAMI 20ga pressure level.

Due to the time/pressure curve, that 11,500 psi is no longer 11,500 psi once it gets to a point in the barrel that is .025" thick. Chamber pressure peaks at (roughly) the chamber mouth and drops rapidly as the shot column moves down the bore.

You might want to check that doubtfulness. The chamber pressure of a shotshell can NOT be extrapolated from payload weight and velocity. Claybuster alone lists at least half a dozen 3/4 ounce, 1100-1200 FPS loads for the 20 ga that well exceed 11000 psi.

Well said, Dewy Vicknair. I knew from studying your work that you're a patient man.

http://www.gamaliel.com/nobelsporttarget/noble_sport_20ga_low_recoil_34oz_8_1200_fps.asp

Nothing listed for guns in the States is going to exceed 11,500 psi by much, because 12,000 psi is the SAAMI service pressure standard for the 20ga. A shotshell manufacturer wouldn't want to cross over into that territory . . . just in case there were a catastrophic failure with their ammo.

I'm out.

Brian, I know I've heard of that 3/4 oz Fiocchi 20ga load previously, but I couldn't find it in lists of their products. If it's 2 1/2" and has the CIP stamp of approval, then the pressure standard is even lower than the US SAAMI standard. If you want to be completely safe--again, assuming gun in good condition--the 2 1/2" 3/4 oz RST load is an excellent choice. They make those shells for short-chambered guns and hold the pressure down accordingly.

Checking the Claybuster chart for their 3/4 oz (1075-20) wad--since we're talking 3/4 oz 20ga (although Brian has indicated he doesn't reload), I find 12 loads at or above 11,000 psi. Zero under 1200 fps, 4 at 1200 fps, 8 at 1250 fps. While it's true that you cannot derive pressure simply from powder charge, shot charge, and muzzle velocity, here we're talking about a factory load that's 125-175 fps under the velocities listed by Claybuster. And if you take any of those high velocity loads that list a lighter powder charge to produce a lower velocity, the pressure does drop accordingly.

Yes indeed; I fully understand that. My point was the max pressure allowed is mainly dependant upon the thickness of the barrel wall where it occurs. Most other forces upon the gun are going to be determined by the same causes which affect the recoil.
If one load has higher pressures its going to stress the barrel wall to a higher level.
If another ,load has more recoil its going to stress the rest of the gun to a higher level regardless of the pressure.
An obstruction can of course raise the pressure at a point down the barrel to which it would not ordinarily reach, thus we see many bulged or burst barrels down in that .025" area which attest the gun does care what pressure is reached.

And I've seen at least one Fox 20 that blew out the chamber--although I'm sure that took a lot more pressure than 11,500 psi.