.308 reduced load test

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Nature Boy

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Thought I would share some of my results from last weekend.

Loaded up 3 groups of 10 rounds each of H4895, using Nosler 180g BTs, LC brass trimmed to 2.005, CCI 200 primers, OAL 2.800, fired through my FN SPR, round robin method.

Here's the chrono data:
Group A. 33g
H-2178
L-2140
A-2159
ES-38
SD-11

Group B. 34.8
H-2306
L-2225
A-2257
ES-81
SD-24

Group C. 36.1
H-2406
L-2322
A-2374
ES-84
SD-30

Here's the results:
080A4612-5258-4CB3-9060-1BD70E44BD89.jpg

Group A at 33g looks promising so I loaded up 50 more to see if it stays consistent.
 
Because I bought 500 in a bulk deal from RMR so it's what I have the most of in inventory.

Beside, I bought them to shoot. I just need to save enough for hunting season
 
Not sure how well those 180s will expand at that velocity. I do know I have had good luck with similar loadings using the 125g nosler.

Assuming 100yd targets? Looks good, very little vertical spread on that first one.
 
That 33gr load looks very accurate. I would check with Nosler to be sure that bullet will expand at under 2200fps and even less @100 yards before you use it on game. When I built reduced 30-06 loads it was with a bullet meant for the 30-30.
 
I'm soon to do the same. But I will likely be using other powders. Did any of your loads come from published sources that indicated what pressures they are loaded to? I'm wanting to create 7.62 cetme level rounds. I know I can use data for 300 savage, but would rather use published data for the chamber in I am actually loading.
 
Nosler BT is excellent for this application.

Just look it up.

Nosler Ballistic Tip is made to expand at velocities less than Accubond. In fact lots of Internet 'chatter' claims the BT is a lousy bullet because it breaks apart upon impact at hyper velocities. Well, it is not made for hyper velocity at impact. It is made for modest velocity. It is a good choice for 2178 feet per second at the muzzle. You don't have to contact Nosler, you only have to go to the Nosler web site for confirmation, my friends.

http://www.nosler.com/ballistic-tip-bullet/

Scroll down to "Optimum Performance Velocity" and see that it's good down to 1800 feet per second.

So how fast is your bullet travelling at 200 yards? (Reduced load won't hunt at 500 yards, you know, so let's pick 200 yards). You grab the Nosler handbook and go to the Universal Ballistic Tables for the ballistic coefficient matching that 180 grain bullet (BC = 0.507). You look up the table for muzzle velocity 2100 fps and then glance down to 200 yard range. You find that it's velocity is 1802 feet per second.

Perfect!

If you want more velocity, drop down to 168 grain BT. Or 165. Or 150. Lots of good choices.



I'll also say, when you are testing a load for accuracy, you must use accurate bullets. Using crappy bullets, or bullets not intended for your application, will give you crappy results. You waste powder primer & projectiles and get nowhere. Using Nosler Ballistic Tip is a great choice. Our man Nature Boy did it right.

Good job, NB. Now I would experiment with seating depth to get the right 'jump' in the chamber, that will fine tune your 33 grain load. Sometimes a short jump, sometimes a medium jump, seldom a long jump. Work with it to fine tune.


Story: My buddy's 9 year old daughter begged to go deer hunting, he only had a 270 Winchester that was too much for her with factory ammo. Using Nosler Ballistic tip 130 grain I worked up a reduced load of H4895 and they are magnificent! Little Alexia loves it! She'll never shoot past 150 yards so the velocity is right in the ballpark. That reduced load made a hunter out of a little girl.
 
Went to the range with 50 of group A and after 15 rounds it's become apparent to me that I have something wrong with my rifle. I'm frustrated
 
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