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11-30-2014, 11:39 AM | #3 | ||||||
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http://parkerguns.org/forums/picture...&pictureid=590
This one is square in the corner . http://parkerguns.org/forums/picture...&pictureid=543 This ones rounded in the corner . |
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The Following User Says Thank You to CraigThompson For Your Post: |
11-30-2014, 11:42 AM | #4 | |||||||
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Or was it more likely any that did were shall we say overly abused ? |
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11-30-2014, 12:12 PM | #5 | |||||||
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So, With the common black powder loads of the day, I wonder if too heavy a load could have been the reason for the Parker design. Could very early smokeless loads caused an issue? heck- could it just be the radius was easier to do the final fitting of the barrel with? wiser Parkerites than I would need to answer the question
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"If there is a heaven it must have thinning aspen gold, and flighting woodcock, and a bird dog" GBE |
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11-30-2014, 01:02 PM | #6 | ||||||
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Well it's a pretty good idea I would think if a fella just wanted a lifter gun to shoot some to go ahead and find one in decent shape that was "radius" cut rather then square cut ?
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11-30-2014, 02:00 PM | #7 | ||||||
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Craig I don't know if that's the best thing to do. My Lifter 8526 has the square corner and is not cracked. Shooting it with Black Powder loads it may crack or it may not. It was not real expensive. For a shooter may be better to take the risk saving up front.
Way I see it if you avoid one that's cracked conditon and price are major factors not what could happen. I have another Parker hammer gun that was several times the lifters price, it's a radius corner. William |
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11-30-2014, 09:24 PM | #8 | ||||||
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I have seen several early lifters which have cracked at the corner between the water table and the standing breach. I believe the change to the radius corner was about the low 14K range.
A tight included angle is a stress riser. The reason is that stresses which develop from a shot need to be distributed so there isn't a concentration at a single point. A radius has an arc which distributes the stresses like a sunburst (or in this case a quarter sunburst) a non-radiused corner only has two directions, 90 degrees to each other, where stress can be distributed. Consequently the stresses are much higher in each of the two directions than if they were distributed around this quarter-arc. Only just a while back there was a $250 grade lifter that sold at auction, in PA. It was cracked at this intersection. I believe our beloved Stosh (Dave Suponski) also has a cracked lifter. The second example you linked is likely a grade 2, but if you look at the photos of grade 3 and up lifters on the home page, under grades, you will also see there is a reinforcing bead on the side of the frame, just above the lock plates, at this intersection. |
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11-30-2014, 09:27 PM | #9 | ||||||
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No cracked lifters here Edgar. I don't know who bought that gun.
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"Much care is bestowed to make it what the Sportsman needs-a good gun"-Charles Parker |
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11-30-2014, 09:32 PM | #10 | ||||||
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My most recent Parker purchase 14290 is a 16 Ga. O frame with square corner Breach ,No Cracks ! Hunted Pheasants with it this season and Woodcock !
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