Help sighting in - The Firearms Forum

1LoneWolf75 · 06-20-2012, 07:47 AM

I need help with a sighting in problem. I let my dad keep my Marlin .30-30 and he re-sighted it. I now have a small range to shoot at and would like to re-sight it. My question is, using 150 grain factory loads ( I know not greatly consistent just waitin fer money fer reloadin stuff) how high should it be at 50yards to hit on at 200 yards? Also how high should it then be at 100 yards? My personal range is 100 yards. Thanks fer yer help guys

Old Grump · 06-20-2012, 09:51 AM

Not as much of a rainbow arc as most people think, 3 1/2" high at 50 will be 4" low at 200 and that is still kill zone but unless you scope it I would stay at 150 yards or less for a sure kill or go with the LeverEvolution ammo. I have both and I just zero at 60 yards and call it good. I am consistently in the heart at 100 yards shooting off a shooting stick with that zero with both my 30-30 and 32 Win spcl.

150 SPCL 50 yards - (0.2) 100 yards - (zero) 150 yards - (-2.4) 200 yards - (-7.6)

Here is what you want:

http://www.sportsmansguide.com/Outdo...s/3030wbal.htm

and for most other calibers this will be close:

http://www.sportsmansguide.com/Outdo...allistics.aspx

JLA · 06-22-2012, 10:13 PM

yep. sight it for 50 yds dead on and it should be a tad high at 100 and a tad low at 200

bluesea112 · 06-28-2012, 12:50 PM

You may already know this, but it is worth mentioning anyway. If your 30-30 has a band over the barrel, then you need to let the barrel completely cool down between shots. Since the barrel is not floated, it will make contact with other metal on the gun as the barrel heats up. This can change how the barrel vibrates when fired, and can throw your bullet off as much as 4" - 6" at 100 yards. Accuracy is all about consistancy. The only way to be sure that a non-floated barrel vibrates exactly the same way shot after shot is to let the barrel completely cool down between shots.
Have you ever sighted your rifle in with 4 out of 5 shots hitting the target in a nice group, but 1 out of the 5 shots flew way off to the left or right? That flyer was caused from the barrel's contact points changing as the barrel heated up, which made the barrel vibrate differently. If you let the barrel cool down between shots, you can avoid those frustrating flyers.

1LoneWolf75 · 06-28-2012, 06:15 PM

Thank yall fer the info!!!

06-20-2012, 07:47 AM	#1
1LoneWolf75 Senior Member Join Date: Apr 2012 Location: Humboldt KS Posts: 597	Help sighting in I need help with a sighting in problem. I let my dad keep my Marlin .30-30 and he re-sighted it. I now have a small range to shoot at and would like to re-sight it. My question is, using 150 grain factory loads ( I know not greatly consistent just waitin fer money fer reloadin stuff) how high should it be at 50yards to hit on at 200 yards? Also how high should it then be at 100 yards? My personal range is 100 yards. Thanks fer yer help guys __________________ They can have my guns when they pry them from my cold, dead hands!!! "Democracy will cease to exist when you take away from those who are willing to work and give to those who are not." - Thomas Jefferson "I've seen the system fall apart from the rules and all our presidents lie"--"Soul Survive"- Asphalt Ballethttp://www.youtube.com/watch?v=w6DgVrYWw00 -->

06-20-2012, 09:51 AM	#2
Old Grump Advanced Senior Member Join Date: Feb 2010 Location: Little hut in the woods near Blue River Wisconsin Posts: 2,293	Re: Help sighting in Not as much of a rainbow arc as most people think, 3 1/2" high at 50 will be 4" low at 200 and that is still kill zone but unless you scope it I would stay at 150 yards or less for a sure kill or go with the LeverEvolution ammo. I have both and I just zero at 60 yards and call it good. I am consistently in the heart at 100 yards shooting off a shooting stick with that zero with both my 30-30 and 32 Win spcl. 150 SPCL 50 yards - (0.2) 100 yards - (zero) 150 yards - (-2.4) 200 yards - (-7.6) Here is what you want: http://www.sportsmansguide.com/Outdo...s/3030wbal.htm and for most other calibers this will be close: http://www.sportsmansguide.com/Outdo...allistics.aspx __________________ "When once a republic is corrupted, there is no possibility of remedying any of the growing evils but by removing the corruption and restoring its lost principles; every other correction is either useless or a new evil."~~- Thomas Jefferson Roman Catholic, Life Member of American Legion, VFW, Wisconsin Libertarian party, Wi-FORCE, WGO, NRA, JPFO, GOA, SAFand CCRKBA

06-22-2012, 10:13 PM	#3
JLA TFF Moderator/Host Join Date: Feb 2007 Location: Heart Of Texas Contributor Posts: 17,319	Re: Help sighting in yep. sight it for 50 yds dead on and it should be a tad high at 100 and a tad low at 200 __________________ It takes 43 muscles to frown, 17 to smile, and 3 for proper trigger squeeze. The latest caliber or gear is no substitute for experience and skill. Rifles and cartridges don't make hits -- shooters do. Fact of life: After Monday and Tuesday, even the calendar says WTF!

06-28-2012, 12:50 PM	#4
bluesea112 Advanced Senior Member Join Date: Nov 2005 Location: West, TX Contributor Posts: 1,257	Re: Help sighting in You may already know this, but it is worth mentioning anyway. If your 30-30 has a band over the barrel, then you need to let the barrel completely cool down between shots. Since the barrel is not floated, it will make contact with other metal on the gun as the barrel heats up. This can change how the barrel vibrates when fired, and can throw your bullet off as much as 4" - 6" at 100 yards. Accuracy is all about consistancy. The only way to be sure that a non-floated barrel vibrates exactly the same way shot after shot is to let the barrel completely cool down between shots. Have you ever sighted your rifle in with 4 out of 5 shots hitting the target in a nice group, but 1 out of the 5 shots flew way off to the left or right? That flyer was caused from the barrel's contact points changing as the barrel heated up, which made the barrel vibrate differently. If you let the barrel cool down between shots, you can avoid those frustrating flyers.

06-28-2012, 06:15 PM	#5
1LoneWolf75 Senior Member Join Date: Apr 2012 Location: Humboldt KS Posts: 597	Re: Help sighting in Thank yall fer the info!!! __________________ They can have my guns when they pry them from my cold, dead hands!!! "Democracy will cease to exist when you take away from those who are willing to work and give to those who are not." - Thomas Jefferson "I've seen the system fall apart from the rules and all our presidents lie"--"Soul Survive"- Asphalt Ballethttp://www.youtube.com/watch?v=w6DgVrYWw00