HELP? Looking for dimensions for bullets horandy 60gr SP??


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ivanthehunter
March 1, 2013, 06:49 PM
:( I'm not allow to reload here in Ireland! So I have no manuals or friends that have bullet manuals etc etc because of government fears about such things!!

Im trying to find the length and possibly any other dimensions of the 60gr SP .224 horandy bullet which is found in their 220 Swift offerings.

Why do i need the length and other dimensions ?? well I own a rem700 with a measured twist of 1 in 13.6"
In order for me to get some of this ammo i have to order a pile of it! and its around $40 for 20no!!:what::eek:

I want to see if my twist will stabilise these rounds using software prior to committing to a large order!

the software asks for secant radius, metapat dia, curved length & overall bullet length

look lads I'm a total novice with all things reloading but I'm always willing to learn and I'm asking for some help!!

I tried looking on line but I dont really know where to begin so I thought of the place and thought this would the best spot to ask!

thanks in advance for any help!

Regards Ivan Ireland

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Mccarty
March 1, 2013, 06:52 PM
Are there any specs in particular ?
60 gr SP
BC=0.0264
C.O.L. = 2.680" for 220 swift
Sectional density =0.171"
Diameter = 0.224"

That is all the hornady book lists for specs

Mccarty
March 1, 2013, 06:57 PM
The only other note in the book for 60 gr bullets is that the 60 gr VMax bullet will not stabilize in a 1:14 twist and slower barrel

Bad Andy
March 1, 2013, 07:44 PM
Log onto Hornadys' web site

ivanthehunter
March 1, 2013, 08:07 PM
ye the vmax is a lot longer looking? and its length that really effects stability afaik.. Dont forget those vmax have a super sharp point and a boat-tail if i remember correctly.. this all adds to the length..

The 60 grain Soft point has a stout nose to add support to the lead soft tip, it also has a flat base and a good curve to the radius.

Whats the COL? cartridge overall length??
if so i dont know how to calculate the bullet heads length from that because i dont know the recommended seating depths

JimKirk
March 2, 2013, 01:20 AM
The Hornady 60 grain SP bullet is 0.700" according to JBM Balistics bullet length list...

Here is the link to the JBM ... Miller Stability calculations....

http://www.jbmballistics.com/cgi-bin/jbmstab-5.1.cgi

According to the factory specs that bullet at 3600 fps would be stable out of your 13.6" twist barrell ....

There are many calculaters at the home page at JBM ...along with the bullet length list...

ivanthehunter
March 2, 2013, 05:36 PM
thank you Jim-

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