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-   -   Head to head 308 family cartridges. (http://www.firearmstalk.com/forums/f18/head-head-308-family-cartridges-92356/)

Apex-Predator 06-15-2013 10:24 PM

Head to head 308 family cartridges.
 
Did a quick comparison of the 308 family of cartridges for a 500 yard hunting/target cartridge, and I figured I would post the results.
All measured with 200 yd zero at 500 yd.
Measured everything with Ballistic Tips since to me they are something of the standard by which everything else is judged, and I threw in some ultra high BC bullets such as the Berger VLD and Accubond LR, all speeds are set to mimic factory loads.

308
2700fps 168gr Ballistic Tip 1864fps 1297 ft/lbs 48.2" drop
2600fps 180gr Ballistic Tip 1807fps 1307 ft/lbs 51.8" drop
2500fps 190gr Accubond LR 1874 fps 1482 ft/lbs 52.3" drop

7mm-08
2800fps 140gr Ballistic Tip 1938fps 1167ft/lbs 44.6" drop
2700fps 150gr Ballistic Tip 1869fps 1163 ft/lbs 48.2" drop
2700fps 150gr Accubond LR 2016fps 1354 ft/lbs 44.7" drop

260 Rem
2950fps 120gr Ballistic Tip 2012fps 1079 ft/lbs 40" drop
2750fps 140gr Ballistic Tip 1933fps 1162 ft/lbs 45.6" drop
2950fps 123gr SST 2099fps 1203 ft/lbs 38.9" drop
2750fps 140gr VLD 2061fps 1321 ft/lbs 42.8" drop

243
2950fps 95gr Ballistic Tip 1842fps 716ft/lbs 44.2"" drop
2950fps 95gr VLD 2051fps 887 ft/lbs 39.8" drop

TruggieTex 06-15-2013 10:32 PM

Wow!

Nice work, Dr. Apex....

To confirm, drop is represented as the difference in 200 and 500yds?

Apex-Predator 06-15-2013 10:32 PM

Yep, 200yd zero and drop measured at 500 yd.
Seems to me that the best compromise is between the 7mm-08 and 260, they both deliver impressive energy with respectable trajectory, but the original held it's own quite well with the 168gr.

jpattersonnh 06-15-2013 11:56 PM

ok. .308 w/ 200 yard zero, Barnes 168gr TTSX MV 2650(2700 is max load for this weight, Usually does not shoot well) At 500 yards it has 53" of drop, 10.1MOA. Velosity is 1727fps and fpe is 1112fpe
Hornady SST 165gr 2650fps mv, 53" drop V at 500 yards, 1725 w/ 1090fpe.
Nosler BT 168gr, same 2650mv, 51" drop, 9.8moa, V=1722fps, fpe = 1204.

I think practical loads would be better. 90% of the .308 hunters use a 150gr.
Remington Cor-Lokt or similar.
150gr Core-lokt, mv 2700fps. 500 yards, V=1493fps, 743fpe and a drop of 60" or 11.5MOA. 11.5moa translates to 46 clicks on a 1/4" scope. With a 10mph cross wind it is 34" off. 5mph is a huge deal when shooting distance. The cartridges you listed are still going to be effected between 15 to 18", basicly 3moa at 500 yards. That makes for a wounded animal or a loosing target. Now the data you posted is also for a 24" barrel. Using an 18" or 20" barrel will drop the velosity further.
Your data is sound, but nothing is fool proof.

Apex-Predator 06-16-2013 11:17 AM

Certainly 150gr is far and away the most popular in 308, even I Mr ballistics buff use the 150gr Speer BTSP in my 308, mind you only because my rifle does not like anything in 165-168gr at all, but it will shoot 180gr Sierra Game Kings just as well as any 150gr.

jpattersonnh 06-16-2013 12:22 PM

That is interesting. Are the 165..168 all boat tail that you have tried? I've got a few rifles that shoot certain weights better in flat base.

JimRau 06-16-2013 02:17 PM

Quote:

Originally Posted by Apex-Predator (Post 1277379)
Yep, 200yd zero and drop measured at 500 yd.
Seems to me that the best compromise is between the 7mm-08 and 260, they both deliver impressive energy with respectable trajectory, but the original held it's own quite well with the 168gr.

You need to stop trying to confuse this issue with facts!!!!:D

Apex-Predator 06-16-2013 07:30 PM

Quote:

Originally Posted by jpattersonnh (Post 1277883)
That is interesting. Are the 165..168 all boat tail that you have tried? I've got a few rifles that shoot certain weights better in flat base.

Tied 165gr SST, Game Kings (HP and SP), and 168gr Ballistic Tips, with Varget, Big Game, W748, RL15 and IMR4350, thus far nothing has done any better then 1.25" at 100 yards, 150gr Speer BTSP and 180gr Game Kings both touch holes and shoot consistent 1/2 MOA groups with Varget and W748 respectively. No 165gr flat base yet but once I can get my hands on some old style Interlocks, Pro Hunters or 165gr Deep Curls I will give them a go.

cottontop 06-16-2013 09:42 PM

Don't forget the .358 Winchester which is also in the .308 family of cartridges.
ct

Apex-Predator 06-17-2013 01:10 AM

Oh I like the ol 358 and even the newcomer .338 Fed but neither one of them is in any contention for any long range work, both of those are hard hitting woods rifles. Besides kinna hard to do an apples to apples comparison since I cannot get Ballistic Tips in 338 and 358 caliber.


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