Long Range Hunting Online Magazine


Go Back   Long Range Hunting Online Magazine > Rifles, Reloading, Optics, Equipment > Reloading

Reloading Techniques For Reloading


Reply

just curious

 
LinkBack Thread Tools Display Modes
  #1  
Old 10-14-2010, 01:28 PM
Junior Member
 
Join Date: Apr 2010
Posts: 17
just curious

Part of the fun of starting to reload is trying to figure out why things are the way they are. According to my measurements using the hornaday oal gauge and bullet comparator the shortest jump to the lands I can achieve with a barnes 130 grain ttsx while still fitting in the magazine is .010. With a 130 grain nosler accubond the shortest jump to the lands while still fitting the magazine is 0.075. I decided to take some measurements on each bullet and in an attempt to understand the differences between the two.
Bullet length (ttsx- 1.324, acc – 1.241)
Comparative Bullet length using hornaday bullet comparator (ttsx – 1.785, acc – 1.702)
The actual bullet comparator that attaches to the calipers is 1.002. By subtracting that number from the comparative bullet length I figured that would give me the distance from the base of the bullet to the ogive. (ttsx-0.783, acc- 0.700)
By subtracting the length found above from the bullet length I figured I would get the distance from the tip to the ogive. (ttsx-.541, acc- .541)

I am thinking I did something wrong or had a misconception along the way. It seems to me that if both bullets actually have the same distance from the ogive to the tip they should be able to achieve the same jump to the lands while just fitting the magazine.
Reply With Quote
  #2  
Old 10-14-2010, 03:22 PM
Platinum Member
 
Join Date: Aug 2003
Location: NC, oceanfront
Posts: 3,210
Re: just curious

Quote:
Originally Posted by rclouse79 View Post
It seems to me that if both bullets actually have the same distance from the ogive to the tip they should be able to achieve the same jump to the lands while just fitting the magazine.
The tip doesn’t have anything to do with it.

Quote:
Originally Posted by rclouse79 View Post
According to my measurements using the hornaday oal gauge and bullet comparator the shortest jump to the lands I can achieve with a barnes 130 grain ttsx while still fitting in the magazine is .010. With a 130 grain nosler accubond the shortest jump to the lands while still fitting the magazine is 0.075.
How did you get this? This OAL ‘stick’ presses against the back of a bullet through a modified case right?

Quote:
Originally Posted by rclouse79 View Post
the distance from the base of the bullet to the ogive. (ttsx-0.783, acc- 0.700)
The TTSX is merely .083 longer from that stick/bullet base to the ogive.
But your seating depth, set by your seating die, will still be the same distance from the lands with either bullet because the datum here(ogive) is independent of bullet length. The only difference is that the TTSX will be seated deeper in the neck.
You will still need to determine best OAL to ogive, and I wouldn’t bother with one of them sticks. Pick up a Sinclair ‘NUT’ and measure it with calipers.
Reply With Quote
  #3  
Old 10-14-2010, 04:51 PM
Gold Member
 
Join Date: Aug 2007
Location: Canterbury, New Zealand
Posts: 675
Re: just curious

rclouse79 - the maths you did on the numbers you posted look right.
I agree that if the tip - ogive length is the same then they should have the same jump to the rifling if seated to mag length ie base of cartridge to tip of bullet is identical.

I have never used the Hornady tool but have heard that you have to get the "feel" right, repeat a number of times and average results.

Don't know if I have helped at all.

Stu.
Reply With Quote
Reply

Bookmarks

« Group | 30-06 loads »
Thread Tools
Display Modes


Similar Threads for: just curious
Thread Thread Starter Forum Replies Last Post
Just curious about age ss7mm General Discussion 93 08-05-2012 03:51 AM
Just Curious Southpaw Website & Forum Support 3 02-12-2009 06:49 AM
Colorado Just Curious mixerdriverm West 5 01-17-2009 12:06 PM
Curious about the 7mm RUM.. Jake in NC Rifles, Bullets, Barrels and Ballistics 8 04-07-2003 10:41 AM
S1, I'm curious... MAX Rifles, Bullets, Barrels and Ballistics 10 01-02-2003 12:08 AM

Current Poll
Spot & Stalk or Ambush For Western Deer?
MOSTLY - Spot & Stalk - 73.77%
1,021 Vote
MOSTLY - Ambush - 26.23%
363 Votes
Total Votes: 1,384
You may not vote on this poll.

All times are GMT -5. The time now is 07:28 AM.


Powered by vBulletin ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Management Powered by vBadvanced CMPS
All content ©2010-2014 Long Range Hunting, LLC