Variables for accuracy

RomaRana · February 16, 2002, 01:11 AM

I know that consistancy is the key to accuracy. But what are the variables that lead to this consistancy.

for example: Bullet concentricity(spelling), consistant powder,etc.

Could you please list them in order of importance. and why you put them in that order.

C.R.Sam · February 16, 2002, 02:20 AM

Case capacity would be a biggie. Stick with one brand and if really picky, stick with one lot from that brand. Affects load density and therefore pressure.

Case length, if trimmed all to same length, tension on bullet more uniform

Uniform powder charges

Sort bullets by weight.

Seat primers consistantly.

Check primer flash holes for consistancy.

Some spin the loaded hulls to check for neck and bullet concentricity.

I'm sure there is more to come.

Sam

ryucasta · February 16, 2002, 02:28 AM

Agreed

DAVID NANCARROW · February 16, 2002, 03:20 AM

It also helps to start out with an accurate firearm

RomaRana · February 16, 2002, 03:54 AM

I bet it does

DAVID NANCARROW · February 16, 2002, 05:12 AM

by the way, Roma-nice website!

WESHOOT2 · February 17, 2002, 10:54 PM

If consistency is critical why do so many most accurate loads have such high extreme spreads?

I am still seeking the answer to accurate loads; at this point I like primer seating procedure and crimp.

C.R.Sam · February 18, 2002, 01:10 AM

There is a nice meaty buck out there at 200 yards. You pick your target; neck, nose, shoulder or whatever. A 100 fps variation in your .308 isn't going to make enough difference in point of impact.

But it makes some difference.....enough to put you out of the money in a match.

With 99.999 percent of shooters, the biggest variable is the shooter.

I know one who fired a 400 40X in a match. That day, everything was consistant.

Sam

WESHOOT2 · February 18, 2002, 01:24 AM

Not talking consistent impact velocity; talking accuracy.

Weird how separate these two components may be when talking handguns.

And, as always, ".....but NOT always....."

Redneck2 · February 18, 2002, 06:33 AM

Two sources...try Fred Sinclair's book "The Accurate Rifle" www.sinclairintl.com

Also, Varmint Al's website. Lots more info than can be put here.

bowhnter · February 18, 2002, 04:21 PM

How about matching up cases, and bullets? Weigh each case and sort accordingly. Same w/ bullets. 5 complete rounds that components weigh the same should shoot a ragged hole.

Also seating depth. Each gun is different. Some like 'em long and others shorter. Trial and error to find out what yours likes. I also make up loads in .1 increments. Max charge is usually not the most accurate. I know it takes a lot longer, but when you see a 5 shot ragged hole at 100 yds. You'll feel like "Da man"

February 16, 2002, 01:11 AM	#1
RomaRana Member Join Date: November 29, 2001 Location: Lapland Posts: 57	Variables for accuracy I know that consistancy is the key to accuracy. But what are the variables that lead to this consistancy. for example: Bullet concentricity(spelling), consistant powder,etc. Could you please list them in order of importance. and why you put them in that order. __________________ Http://www.romarana.com

February 16, 2002, 03:54 AM	#5
RomaRana Member Join Date: November 29, 2001 Location: Lapland Posts: 57	I bet it does __________________ Http://www.romarana.com

February 17, 2002, 10:54 PM	#7
WESHOOT2 Senior Member Join Date: February 20, 1999 Location: home on the range; Vermont (Caspian country) Posts: 14,324	NOT SO FAST.............. If consistency is critical why do so many most accurate loads have such high extreme spreads? I am still seeking the answer to accurate loads; at this point I like primer seating procedure and crimp. __________________ . "all my ammo is mostly retired factory ammo"

February 18, 2002, 01:24 AM	#9
WESHOOT2 Senior Member Join Date: February 20, 1999 Location: home on the range; Vermont (Caspian country) Posts: 14,324	HANDGUN ONLY Not talking consistent impact velocity; talking accuracy. Weird how separate these two components may be when talking handguns. And, as always, ".....but NOT always....." __________________ . "all my ammo is mostly retired factory ammo"

February 18, 2002, 06:33 AM	#10
Redneck2 Senior Member Join Date: April 24, 2000 Location: Northern Indiana Posts: 519	These should help Two sources...try Fred Sinclair's book "The Accurate Rifle" www.sinclairintl.com Also, Varmint Al's website. Lots more info than can be put here.

February 16, 2002, 02:20 AM	#2
C.R.Sam Senior Member Join Date: October 29, 1999 Location: Dewey, AZ Posts: 12,858	Case capacity would be a biggie. Stick with one brand and if really picky, stick with one lot from that brand. Affects load density and therefore pressure. Case length, if trimmed all to same length, tension on bullet more uniform Uniform powder charges Sort bullets by weight. Seat primers consistantly. Check primer flash holes for consistancy. Some spin the loaded hulls to check for neck and bullet concentricity. I'm sure there is more to come. Sam

February 16, 2002, 02:28 AM	#3
ryucasta Senior Member Join Date: February 4, 2002 Location: Los Angeles, CA Posts: 431	Agreed

February 16, 2002, 03:20 AM	#4
DAVID NANCARROW Senior Member Join Date: November 5, 2000 Location: Wyoming Posts: 1,761	It also helps to start out with an accurate firearm

February 16, 2002, 05:12 AM	#6
DAVID NANCARROW Senior Member Join Date: November 5, 2000 Location: Wyoming Posts: 1,761	by the way, Roma-nice website!

February 18, 2002, 01:10 AM	#8
C.R.Sam Senior Member Join Date: October 29, 1999 Location: Dewey, AZ Posts: 12,858	There is a nice meaty buck out there at 200 yards. You pick your target; neck, nose, shoulder or whatever. A 100 fps variation in your .308 isn't going to make enough difference in point of impact. But it makes some difference.....enough to put you out of the money in a match. With 99.999 percent of shooters, the biggest variable is the shooter. I know one who fired a 400 40X in a match. That day, everything was consistant. Sam

February 18, 2002, 04:21 PM	#11
bowhnter Senior Member Join Date: February 10, 2002 Location: Rochester, NY Posts: 173	How about matching up cases, and bullets? Weigh each case and sort accordingly. Same w/ bullets. 5 complete rounds that components weigh the same should shoot a ragged hole. Also seating depth. Each gun is different. Some like 'em long and others shorter. Trial and error to find out what yours likes. I also make up loads in .1 increments. Max charge is usually not the most accurate. I know it takes a lot longer, but when you see a 5 shot ragged hole at 100 yds. You'll feel like "Da man" __________________ bowhnter =========== "None but an armed nation can dispense with a standing army. To keep ours armed and disciplined is therefore at all times important, but especially so at a moment when rights the most essential to our welfare have been violated." --Thomas Jefferson -----, 1803. ME 10:365