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Muzzleloader Hunting Techniques For Muzzleloader Hunting


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vertical stringing

 
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  #8  
Old 01-10-2013, 02:49 PM
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Join Date: Apr 2011
Location: NE Michigan
Posts: 288
Re: vertical stringing

I couldn't stand it so, I made my way to the bench.

If there is in combination or either by itself, springboarding, hinge pin or locking bolt movement of .005" there can be a 13" difference, or any where in between at 200yds POI. This movement has to happen between the point of ignition and the point at which the bullet leaves the barrel.

One other point to consider also, is that shooting into a good head wind can contribute.
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  #9  
Old 01-10-2013, 04:43 PM
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Join Date: May 2009
Location: roanoke,va.
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Re: vertical stringing

Wow, Encore, this is getting deep. Sorry to hear about you and your wife coming down with the flu. I had a bad cold. My bro in law came to visit and he got something that kept him here waaaay too long. Then my wife got ill. Good news is that all of us survived. I sure hope you two will be well very soon.
Anyways, I really appreciate the info on the locking spring and all the other possible reasons for the vertical stringing. I also consulted with Allen at Harvester Sabots and a friend about this. Both offered yet another reason. The sabots! Seems some sabots are very heat sensitive and I needed more time between shots for the barrel to cool. It was 61 degrees out. Both said it could take ten or more minutes between shots.
I also believe it could quite possibly be D. all of the above. I checked the hing pin and don't believe that's it. As for the locking spring, while I can push the bolt back by hand; I can't discern any movement in the gun when closed. Nada.
One other thing. My friend who was with me said the barrel "jumped" differently at some shots. Higher or not as much. I could be guilty of having a slightly different pressure on the stock.
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  #10  
Old 01-10-2013, 05:59 PM
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Join Date: Apr 2011
Location: NE Michigan
Posts: 288
Re: vertical stringing

Thanks woodnut. I'm definitely over the hump. The wife still has a ways to go yet. Fever has finally broke and I hope for good. I'm actually feeling much better this evening than I was this afternoon.

Years ago, people would have been happy to hit a paper plate at 100yds, even getting one or two shots into it. Its much different now. Some of the young guys have never experienced what some older muzzleloaders have went through and what's got us to this point. There are some that send hundreds or thousands of rounds through their rifles each year and we're all still trying to improve! And yes, we all want more.

I've always been one, that when l have an issue, one way or the other, I'm going to get to the bottom of it. Believe me, there's been times I didn't want to know too. I do some testing but, its when there's a problem that isn't easily resolved or, something that the shooter needs reinforced in. Sometimes to satisfy my own interests. I use precision equipment to test loading forces and bullet seating pressures to look for differences in POI. Some might say I go a little bit overboard? Well I learned a lot about what ..... MAY..... help to cause vertical strings, especially when I got the math professor involved. That stuff has long been gone from my memory....

One other thing............ just one other small but yet still a contributing factor in your quest for pin point accuracy. Order the HD hammer spring. The faster that hammer hits the pin, the less chance of even the slightest movement. I have both the 44# and the 51# spring. There's a HUGE difference from the 30# factory spring.
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  #11  
Old 01-10-2013, 07:36 PM
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Join Date: May 2009
Location: roanoke,va.
Posts: 208
Re: vertical stringing

Thanks, Encore, and I'm glad you're better. None of us had much if any fever. I'm staying out of crowds and acting like a (healthy) hermit!
As for the hammer spring, I concur. The faster things happen before the bullet leaves the barrel, the better. I said earlier than MGM had done their magic on it. I'm sure the hammer spring was done. It's even engraved! When I got it, it was a 20 TAC and it would shoot bug holes; just like my ARs. That's a wicked cartridge for pasture poodles and other varmints.
I am getting some different sabots from Harvester. Allen was very kind and generous and voluntarily is sending me some samples of his sabots and some bullets,too. Nice fellow. Will wait til it cools down to go shooting again. Thanks again!
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  #12  
Old 01-10-2013, 10:35 PM
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Join Date: Apr 2011
Location: NE Michigan
Posts: 288
Re: vertical stringing

Are you shooting these? 50 CAL .451" 250 GR SPIT-FIRE T-EZ FB - PER 24 W/SABOTS | Barnes Bullets

These bullets with the blue sabot are the T-EZ bullets. The blue sabot is designed to load easier and the bullet has a flat base.

I shoot the 250gr TMZ which does have the boattail. Thousands of them actually. When you seat your bullets, seat them hard, with a solid THUMP using both hands. I average 105# of seating force and it is well known that BH209 needs to be seated hard. If the blue T-EZ loads easy, you may want to try the TMZ bullet with the supplied sabot.

I'm not one to try changing sabots, especially when Barnes has done most of the work. However I have tried some different and found that in every case, they never performed as well as the supplied. I just tried some Harvester Crushed Ribs this fall that a friend gave me and made for the TMZ. They opened up my group to 4"+. If your right to left is centered but, your getting vertical strings, changing sabots most likely won't by itself correct the problem.

Good shoot'n....
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  #13  
Old 01-11-2013, 12:23 AM
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Join Date: Aug 2010
Location: Boncarbo,Colorado
Posts: 100
Re: vertical stringing

i load my bullets with thumb pressure with bh209

The TMZ is a tough loading bullet in the Bergara barrel. I shot an accura v2 with them over a month ago with 110gr bh209 and while they shot excellent, man they were a mother to load with a solid range rod. With a factory ramrod, i would have been crying.
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  #14  
Old 01-11-2013, 05:41 AM
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Join Date: Apr 2011
Location: NE Michigan
Posts: 288
Re: vertical stringing

Quote:
Originally Posted by FrontierGander View Post
i load my bullets with thumb pressure with bh209

The TMZ is a tough loading bullet in the Bergara barrel. I shot an accura v2 with them over a month ago with 110gr bh209 and while they shot excellent, man they were a mother to load with a solid range rod. With a factory ramrod, i would have been crying.
I got the Crushed Ribs from a shooter that shoots here with the Bergara on his Pro Hunter (Bellm Barrel). After he put a couple hundred rounds through that barrel, the TMZ loads fine. He came over and took a doe at 191yds with one last month. A complete pass thru and a short trail you could follow with a Bic lighter. Another buddy shoots them out of his Accura and he had the same results but, they do load harder in his than the Bergara on the Pro Hunter.
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