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Post by kskaggs on Mar 5, 2016 8:22:25 GMT -5
Setting up a buddies encore that Jeff just sent me back it's a bergarra 24 inch the 250 parker be's fall down the barrel the 275 be's had to be sized down a little haven't shot it yet to foul the barrel. Is this what everybody else is seeing? I'm kinda scratching my head a little!!! I put a knurl on the 250's gonna try and pop some primers this afternoon after work we will see.
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Deleted
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Post by Deleted on Mar 5, 2016 8:41:02 GMT -5
Shoot a few saboted to foul the barrel....Maybe your knurling will be the trick....
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Post by kskaggs on Mar 5, 2016 10:39:03 GMT -5
I just didn't understand why there is so much difference between the 250 and 275.
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Post by kskaggs on Mar 5, 2016 10:39:38 GMT -5
I just didn't understand why there is so much difference between the 250 and 275.
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Post by Kyle on Mar 5, 2016 12:27:33 GMT -5
I just didn't understand why there is so much difference between the 250 and 275. A possibility: "If" the die that forms the last operation has a taper on it, the back bearing surface of the bullet will be slightly larger than the front bearing surface. "If" both grain weight bullets are made in the same die, then one might expect the heavier bullet to have a larger diameter on the rear bearing surface since the distance from the front bearing surface is more. Like I said just a possibility. |
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Post by dannoboone on Mar 5, 2016 13:42:01 GMT -5
I once got some 250BE's from Luke which perfectly slide down a McGowen barrel. Later got some direct from Parker Productions which won't even start, and have to be sized. The former measure .451 and the latter measure .452.  ? Both shot very accurately, once the .452's were sized. |
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Post by kskaggs on Mar 5, 2016 18:48:29 GMT -5
Just shot it the 275's shot 2 real good groups 1to1.5 the 250's you would swear the scope was broke one time missed the target completely!! Definitely tell a difference between a cheap barrel and a Brux this barrel is rough when you slide a bullet down nothing line my Brux!! But still shoots respectable!!
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Post by Richard on Mar 5, 2016 20:58:56 GMT -5
I have had similar experiences with Parker bullets in the past. Your best bet is to have a decent micrometer (NOT a caliper) that reads to .0000" . When we are dealing with SABOTLESS bullets, a .0001" can be the difference in "one hand down the barrel and two!" Once you know what your gun likes you can take a new bullet and know immediately how it will loads. If too small?...........Knurl! Too big?.............size! Once you know the setting on your sizing die, if you have to knurl a group of bullets and may have gone too far?...........Just run them thru the die to equalize their diameter.
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Post by houston on Mar 6, 2016 14:20:43 GMT -5
I have had similar experiences with Parker bullets in the past. Your best bet is to have a decent micrometer (NOT a caliper) that reads to .0000" . When we are dealing with SABOTLESS bullets, a .0001" can be the difference in "one hand down the barrel and two!" Once you know what your gun likes you can take a new bullet and know immediately how it will loads. If too small?...........Knurl! Too big?.............size! Once you know the setting on your sizing die, if you have to knurl a group of bullets and may have gone too far?...........Just run them thru the die to equalize their diameter. I just sized a new box or Parker 300gr match hunters and they were 1 thousandth larger than the lot I bought in September, would not even start down the barrel. Pretty poor quality control. jeff~ |
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Post by keith on Mar 7, 2016 16:52:19 GMT -5
It's possible that they are on a set of new dies as well. A set of bullet making dies (depending on material and heat treat) will last several hundred thousand bullets. I have no idea how many Parker bullets have been made and sold in the BE style but I'm pretty sure it is his oldest jacketed design. Based on what I can trend from sales light bullets sell better too. He has also been at this longer than Kyle or me.
If the die is tapered as Kyle suggested you would be able to tell by measuring the cylinder portion of the bullet front and rear because between a 250gn and 275gn I bet there is not a lot more than .100" in bearing surface. Depending on design you are looking at somewhere in the ball park of .100" for every 30gn of weight.
Core seat pressure will also have an effect as well and you can tell by measuring a bullet that hasn't been pointed yet (I understand you don't have one of those to measure). You can actually feel the difference as it goes through the pointing die if there is excessive core seat pressure. If it doesn't cause your bullets to stick in the die you will at least feel them eject really hard from the pointing die.
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butch
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Post by butch on Mar 10, 2016 16:59:29 GMT -5
I know i feel like a real stinker. Jeff did a rush job on me in december and i still havent shot my hankins encore  |
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? Both shot
