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Member Joined: 16 Dec 2007 Posts: 592 Location: Minnesota

I was looking at my FAIR Rizzini manual - which is almost totally written in Italian so I never really paid much attention to it - under the "Table of mandatory tests and the official bench marks" it says 900 kg/cm (bar) for sizes 16 and above. If I understand this correctly - thanks to the pressure reference post from this site - that would be equivalent to 3 1/4 tons or 9,682 psi for the 2 3/4" chambered gun.

Am I reading this correct?

Joined: 17 Sep 2008 Posts: 31 Location: Eastern Washington

900kg/cm^2= 12800psi

Joined: 28 Jan 2007 Posts: 129 Location: hong kong

You may find this conversion site interesting.
http://www.unitconversion.org/unit_converter/pressure.html

it does however come up with
900 bar = 13053 psi.

and
900 kg/cm**2 = 12801 psi

enjoy.

AjaxFjr.

Usually, the average modern gun manufacturer will make sure the strength of the guns exceed the minimum acceptable proof requirements by at least a factor of three. Today's shotguns are plenty strong.

Guest

GG,

What do you mean by a factor of 3? Do you mean 3 times the average maximum service pressure? Or do you mean the average maximum service pressure cubed?

Member Joined: 16 Dec 2007 Posts: 592 Location: Minnesota

Thanks guys.

Just curious about the numbers on the bbls

top bbl says CAM.70 17,0
bottom bbl says KG1.230 17,0

To 16gg's point - I remember reading in a book the prrof pressure is about 1/3 to 1/2 more than the service pressure - SAAMI standards for proof loads for a modern 16ga is 1 1/4 oz with a min/max average PSI of the average proof at 18,000/20,000. At least, that is what I remember.

PatrickB

the CAM 70 indicates the chamber length is 70mm (2 3/4")

the 17,0 on both barrels is the bore diameter (16ga)

the KG 1.230 is the weight of the barrels in Kilograms (2.70 lbs)

Jeff

Guest

GG,

OK, now what is the minimum proof strength, for modern 16 gauge 2 3/4" chambered firearms?

I want to know so I can calculate.

Guest

GG,

Baffle them with bullshit?

Buddy you are a professional, no doubt about it.

Guest

GG,

I suppose that the firearms manufacturers have made you privy to their design standards and specs.

Yeah Sure!!! Dream on!!

Everyone is entitled to their opinion....even an expert like you. Rolling Eyes

Try asking around. You'd be surprised what you might learn.

Read this:

ATTENTION
OWNERS OF REMINGTON 12-GAUGE SHOTGUNS,
MODELS 870, 1100, 11-87, 3200, Sportsman 58, 12-A, and 12-P

Owners of Remington 12-guage Model 870, 1100, 11-87, 3200, and Sportsman 58 and Sportsman 12-A and 12-P shotguns manufactured between 1960 and June 1995 (the \"Shotguns\") who have not previously excluded themselves from the settlement are entitled to receive a payment (\"Settlement Check\"), as part of the resolution of the class action lawsuit in Garza v. Sporting Goods Properties, Inc., Civ. No SA-93-CA-1082(W.D.Tex.). The lawsuit was brought against Remington and DuPont, the former parent company of Remington, by several owners of Shotguns (the \"Class Plaintiff(s)\") on behalf of all such owners. the Class Plaintiffs claimed that the barrel steel formerly used in the Shotguns was not strong enough and the barrels sometimes burst in normal use, causing damage to the gun and, in some cases, serious bodily injury. Remington and DuPont denied--and continue to deny--such claims. They assert that (1) the steel used was appropriate for use in Shotguns; (2) barrel bursts are extreamly rare and occur only when improper ammunition, including improperly loaded ammunition generating much greater than normal firing pressure, is used, or when the barrels are obstructed; and (3) the Remington owners' manual and the accompanying firearms safety booklet gives full and adequate warning of such hazards.

There has been no class action trial regarding these matters. The Class Plaintiffs have not proven any of their claims, and Remington and DuPont have not proven any of their defenses. Instead of engaging in long and costly litigation, the parties have agreed to a settlement, which the United States District Court for the Western District of Texas (in San Antonio) has approved as fair, reasonable and adequate.

Under the terms of that settlement, Remington has begun to make, and will continue to make, barrels for Model 870, 1100, 11-87, 12-gauge shotguns from a different type of steel, which can withstand higher pressures. Also as part of the Settlement, eligible shotgun owners are entitled to receive shares of a cash settlement fund, accompanied by a safety brochure. After payment of notice and administration costs, compensation for Class Plaintiffs, and class counsel's fees and expenses as awarded by the Court, the amount available for distribution as Settlement Checks to owners of the Shutguns is $17.125 million.

To obtain a share of this fund, YOU MUST:

PUT YOUR VERIFIED SIGNATURE, ADDRESS, SOCIAL SECURITY NUMBER, AND TELEPHONE NUMBER ON THE BOTTOM OF THIS FORM ALONG WITH THE SERIAL NUMBERS OF ANY 12-GAUGE REMINGTON MODEL 870, 1100, 11-87, 3200, AND SPORTSMAN 58 AND SPORTSMAN 12-A and 12-P SHOTGUNS YOU OWN. THE FORM MUST BE POSTMARKED NO LATER THAN SEPTEMBER 30, 1996, AND SENT TO THE ADDRESS BELOW.

AS A CONDITION OF CASHING YOUR SETTLEMENT PAYMENT CHECK, YOU WILL BE REQUIRED TO READ, AND TO AGREE THAT YOU WILL FOLLOW THE INSTRUCTIONS CONTAINED IN, THE SAFETY BROCHURE WHICH WILL BE SENT WITH YOUR CHECK. The amount each participating class member is to receive will be based on the number, models and manufacturing dates of his or her Shotgun(s) and the total number of valid claims filed. It is anticipated that Settlement Checks will be sent to eligible owners by January 15, 1997.

EXCLUSIONS: The following are not eligible to receive, or serve as the basis of, Settlement Checks:
a) Employees of Remington and DuPont, except as to Shotguns owned by them for personal use;
b) Resellers and distributors of Remington and DuPont (except as to Shotguns owned by them for personal use, rather than for resale or business promotional purposes); and
c) Recently manufactured Remington 12-gauge shotguns with these or higher serial numbers: Model 870--B457166M; Model 1100--RO64388V; and Model 11-87--PC495255.

IMPORTANT NOTE: If your form is not postmarked on or before September 30, 1996, you will not receive a share of the settlement funds, but you will remain bound by the terms of the settlement, which bars claims (except bodily injury claims) relating to Shotguns manufactured prior to June, 1995.

Oh, yeah, I almost forgot. Razz

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