Boresighting .303 problem

ROGER1254 · 09-22-2007, 01:42 PM

Hi Guys,

First post for me. Hope you can help,

Trying to boresight my No. 4 Mk 1. My .30 arbor is too big. Anyone else have this problem?

Thanks.

billy · 09-22-2007, 02:02 PM

take the bolt out and look down the bore at the target

that will get you in the ballpark.
oh yeah greetings !

Dallas · 09-22-2007, 03:43 PM

Welcome aboard.

samuel · 09-22-2007, 04:18 PM

Welcome.I dont understand what the problem is.The .303 British is .312 bullet.The .30cal.arbor should meisure .295 or such.The right arbor should be the .32 which meisures .305.Someone that is into military guns should know but I thought there was a 7.5 enfield. sam.

gene cobb · 09-22-2007, 05:16 PM

used the 32 but still a pain in the but because the scope sits so high but it did get it on paper

samuel · 09-23-2007, 04:04 AM

Quote:

Originally Posted by gene cobb

used the 32 but still a pain in the but because the scope sits so high but it did get it on paper

They make a boresight for high scope mounts but this is where a laser boresight really pays for itself. All you have to know is the distance between your sight line and bore line and compensate.In other words if the sightline is 1 1/2" over bore line put the crosshairs 1 1/2" over the laser dot.You still have to fine tune.Another way is place a target at 25yds sight in on the bull,fire one shot,put the crosshairs back on the bullseye,hold the firearm firmly,turn crosshairs to where the bullet struck remembering to compensate for boreline-sightline as stated above.You also have to adjust for the drop from 25yds and 100yds or whatever range you are shooting. sam.

billy · 09-23-2007, 05:58 AM

yesterday with a new rifle i did just that.
@25 yds. aim at bulls and chase the bullet.
it took 3 shots to be dead on .
today i will do it @ 100 yds.

09-22-2007, 01:42 PM	#1
ROGER1254 Registered User Join Date: Sep 2007 Posts: 1	Boresighting .303 problem Hi Guys, First post for me. Hope you can help, Trying to boresight my No. 4 Mk 1. My .30 arbor is too big. Anyone else have this problem? Thanks.

09-22-2007, 02:02 PM	#2
billy spiritual counselor Join Date: Jul 2006 Location: a secret lab on the shores of lake titicaca Posts: 11,924 Images: 9 Blog Entries: 145	take the bolt out and look down the bore at the target that will get you in the ballpark. oh yeah greetings ! __________________ internet yards and real yards are completely different units of measure. Last edited by billy; 09-22-2007 at 02:03 PM. Reason: Automerged Doublepost

09-22-2007, 03:43 PM	#3
Dallas PUKHA DAWG Join Date: Mar 2002 Location: Virginia, just outside of Washington D.C. Posts: 3,595	Welcome aboard. __________________ Those who forget History are condemed to repeat it.

09-23-2007, 05:58 AM	#7
billy spiritual counselor Join Date: Jul 2006 Location: a secret lab on the shores of lake titicaca Posts: 11,924 Images: 9 Blog Entries: 145	yesterday with a new rifle i did just that. @25 yds. aim at bulls and chase the bullet. it took 3 shots to be dead on . today i will do it @ 100 yds. __________________ internet yards and real yards are completely different units of measure.

09-22-2007, 04:18 PM	#4
samuel Senior Member Join Date: Dec 2006 Posts: 5,087	Welcome.I dont understand what the problem is.The .303 British is .312 bullet.The .30cal.arbor should meisure .295 or such.The right arbor should be the .32 which meisures .305.Someone that is into military guns should know but I thought there was a 7.5 enfield. sam.

09-22-2007, 05:16 PM	#5
gene cobb Registered User Join Date: Sep 2007 Location: new york state Posts: 6	used the 32 but still a pain in the but because the scope sits so high but it did get it on paper