Range Report - Cold Bore/Fouled Bore - The Firearms Forum

The_Rifleman · 06-24-2010, 12:14 AM

Two shots this time; it's like a double report!

2 shots, 2 Inch Target, 30-06 at 300 Yards

Yesterday when I shot the 3 inch target I had the scope set to hit at 300 yards with a fouled bore. I aimed a little high about right at the top of the target but it still just grazed the bottom. From past experience, I figured it should have hit closer to the center.

Usually my cold bore shot is 1/4moa lower than a fouled bore shot; (3/4" at 300 yards,) I have been cleaning the rifle a little differently by cleaning the copper every 20 or so shots instead of every shooting session. Maybe that has effected my cold/fouled bore POIs.

So today I figured I would test to see where my POIs are, (without cleaning the copper,) by taking a cold bore shot, then a fouled bore shot with the same POA. Sure enough, the POI was about a 1moa difference.

I am going to try again tomorrow to see if I get the same results, then try again the next time I have 2 cartridges, but that time I will clean out the copper.

Rifle: Howa 1500, 30-06
Scope: Nikko Stirling Diamond
Bullet: Hornady 180gr SP
Powder: IMR 4831
Primer: Remington 9 1/2
Case: Winchester

todd51 · 06-24-2010, 08:10 AM

Cool indeed. Thanks for sharing as I do enjoy following your sessions.

Todd

carver · 06-24-2010, 08:16 AM

Same here! I just love the fact you go to so much trouble to video, and post these tests! Any time you post I always check it out, even if I don't comment. Keep up the good work. I have a feeling that some day all of your work will make you a known shooter.

old semperfi · 06-24-2010, 09:45 AM

thanks for info,i too enjoy your reports.remember also that temp,humity,ammo temp are also factors to take in to account. old semperfi

The_Rifleman · 06-24-2010, 10:13 PM

The one thing about my last 4 or so days of shooting were the conditions were almost exactly the same, down to the barometric pressure.

I think I am just missing though; today my shots landed less than 1/2" difference in height. The wind was a little tricky so I didn't hit the target but was on either side of it.

I loaded more ammo and cleaned the copper out so next time I'll see what happens. Hopefully I am just missing; it could be the brass too so I am keeping my eye on the two that hit low.

Thanks, it is good to know that people are reading the posts!

06-24-2010, 12:14 AM	#1
The_Rifleman Senior Member Join Date: Feb 2010 Location: Ohio Posts: 872	Range Report - Cold Bore/Fouled Bore Two shots this time; it's like a double report! 2 shots, 2 Inch Target, 30-06 at 300 Yards Yesterday when I shot the 3 inch target I had the scope set to hit at 300 yards with a fouled bore. I aimed a little high about right at the top of the target but it still just grazed the bottom. From past experience, I figured it should have hit closer to the center. Usually my cold bore shot is 1/4moa lower than a fouled bore shot; (3/4" at 300 yards,) I have been cleaning the rifle a little differently by cleaning the copper every 20 or so shots instead of every shooting session. Maybe that has effected my cold/fouled bore POIs. So today I figured I would test to see where my POIs are, (without cleaning the copper,) by taking a cold bore shot, then a fouled bore shot with the same POA. Sure enough, the POI was about a 1moa difference. I am going to try again tomorrow to see if I get the same results, then try again the next time I have 2 cartridges, but that time I will clean out the copper. Rifle: Howa 1500, 30-06 Scope: Nikko Stirling Diamond Bullet: Hornady 180gr SP Powder: IMR 4831 Primer: Remington 9 1/2 Case: Winchester __________________ Debate isn't "uncivil" behavior. Pointing out illogical reasoning is a legitimate counter argument. That is the problem with internet forum mods, they rarely understand what constitutes legitimate, honest and civil debate. They reward the trolls and annoy the people genuinely trying communicate. I don't really like this place anyway, have fun with your power trip. ...nuff said. -->

06-24-2010, 08:10 AM	#2
todd51 Advanced Senior Member Join Date: Mar 2009 Location: Central, Ohio Contributor Posts: 2,572	Re: Range Report - Cold Bore/Fouled Bore Cool indeed. Thanks for sharing as I do enjoy following your sessions. Todd __________________ Retired Praefectus Vigilum NRA Endowment Member

06-24-2010, 08:16 AM	#3
carver TFF Moderator/Host Join Date: Jul 2008 Location: DAV, Deep in the Pineywoods of East Texas, just west of Shreveport, LA Contributor Posts: 11,268	Re: Range Report - Cold Bore/Fouled Bore Same here! I just love the fact you go to so much trouble to video, and post these tests! Any time you post I always check it out, even if I don't comment. Keep up the good work. I have a feeling that some day all of your work will make you a known shooter. __________________ Y'all be safe now, ya hear! Lamentations Chapter 5: 1. Remember, O LORD, what is come upon us: consider, and behold our reproach. 2. Our inheritance is turned to strangers, our houses to aliens. 3. We are orphans and fatherless, our mothers [are] as widows. 5. Our necks [are] under persecution: we labour, [and] have no rest. 16. The crown is fallen [from] our head: woe unto us, that we have sinned! 21. Turn thou us unto thee, O LORD, and we shall be turned; renew our days as of old.

06-24-2010, 09:45 AM	#4
old semperfi Advanced Senior Member Join Date: Aug 2009 Location: i live in southern indiana,old country boy at heart Posts: 1,506	Re: Range Report - Cold Bore/Fouled Bore thanks for info,i too enjoy your reports.remember also that temp,humity,ammo temp are also factors to take in to account. old semperfi

06-24-2010, 10:13 PM	#5
The_Rifleman Senior Member Join Date: Feb 2010 Location: Ohio Posts: 872	Re: Range Report - Cold Bore/Fouled Bore The one thing about my last 4 or so days of shooting were the conditions were almost exactly the same, down to the barometric pressure. I think I am just missing though; today my shots landed less than 1/2" difference in height. The wind was a little tricky so I didn't hit the target but was on either side of it. I loaded more ammo and cleaned the copper out so next time I'll see what happens. Hopefully I am just missing; it could be the brass too so I am keeping my eye on the two that hit low. Thanks, it is good to know that people are reading the posts! __________________ Debate isn't "uncivil" behavior. Pointing out illogical reasoning is a legitimate counter argument. That is the problem with internet forum mods, they rarely understand what constitutes legitimate, honest and civil debate. They reward the trolls and annoy the people genuinely trying communicate. I don't really like this place anyway, have fun with your power trip. ...nuff said.