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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: July/06/2010 at 14:40
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Chief Sackscratch

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Haven't been reloading long enough to know if I will see a big difference or not but here is what I have.  For my new Savage 223 I loaded some mild loads for break in. 

50 Hornady A-Max 75gr

50 Hornady Match 75gr

Both loaded with the same powder charge and type of powder from the same can.  The Match loads had a slightly less COAL than the AMax.  Say a difference in .15-.20ish.  The Match loads produced awesome results with several .5 MOA 5shot groups and under. The AMax's wouldn't do better than a .75-1.0 MOA group.  Do you think I am judging the AMax's to fast.  I didn't expect the Match to do that much better.  Would you think if I loaded the AMax to the same COAL as the match loads I would see a closer comparison?  I don't have a way to measure to the "ogave" (I think thats right) so I dont know if they have the same distance from base ogave but would think they'd be similar.  



Edited by SVT_Tactical - July/06/2010 at 14:41
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: July/06/2010 at 14:58
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If you have a caliper get a Bullet Comparator from Sinclair. Then you can accurately measure base to ogive.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: July/06/2010 at 15:33
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 YEP!
 
 
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Sinclair Bullet Comparator #1

 

 

We have been making these hex style bullet comparators for over 20 years, and believe we make the most accurate tools available. The holes in the Sinclair Bullet Comparators are cut with throating reamers to accurately duplicate the actual throat of a rifle. The comparator is used with calipers, and allows the reloader to accurately measure the length from the major diameter of the bullet to the case head. It also enables you to make accurate seating depth changes to your bullet seater. The Sinclair Comparator does not attach to your calipers, so your calipers are free for other measurements. Machined from stainless steel.

There are two different models of Sinclair Comparators to cover bullets calibers from .17 caliber to .338. The first model (09-600) features holes bored and throated for .224, 6mm, .257, 6.5mm (.264), 7mm, and 308. The second model (09-700) has holes throated for .172, .204, .224, .270, .308, and .338 caliber.

 


Edited by 300S&W - July/06/2010 at 15:33
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: July/06/2010 at 15:35
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Chief Sackscratch

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But will loading them to the same length to the Ogave make a difference in the two loads.  Say they are both loaded identical would you expect them to perform the same?  BC is almost the exact same.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: July/06/2010 at 15:42
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 An OLD Sinclair catalog I've got says that they've found that once you find the correct oal for one bullet in that rifle that gives optimum accuracy that oal will work with other bullets. Even those of diff weights. It's worked for me up til now.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: July/06/2010 at 15:42
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Is the Amax is a longer bullet, not counting the tip?  If so, that would mean more of that bullet will be in the case most likely if the ogive is the same.  Which means with the same powder change you will probably have more pressure.  Which could be making your accuracy diff.
The Amax has the poly tip which is suppose to make it fly better.  Problem I have seen with them is as the round is riding in your mag upon recoil the tip gets smashed pretty bad.  And the ones I have tried have never been any better than a regular old HPBT bullet.

Unless you are going to use them for hunting I would just use the match.  As they are super accurate anyway.  If you want to use them for hunting though, the Amax would be a better choice.


Edited by supertool73 - July/06/2010 at 15:43
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: July/06/2010 at 15:49
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Chief Sackscratch

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It will be a hunting/target rifle so I wanted to settle on one load that would work for deer, yotes, and one day p-dogs hopefully.  The length looks the same except the tip so I will try to load them the other length and see how they perform.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: July/06/2010 at 15:56
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Originally posted by SVT_Tactical SVT_Tactical wrote:

But will loading them to the same length to the Ogave make a difference in the two loads.  Say they are both loaded identical would you expect them to perform the same?  BC is almost the exact same.


You are loading two bullets with the same weight so I wouldn't be concerned with a big difference in pressures. I would have to assume the two bullets we are talking about here have similar bearing surfaces.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: July/06/2010 at 15:57
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If you are loading them the same tip to tip, then the amax would for sure have more bullet in the case.  That could be your difference. 

I shot a deer with a 178 grain amax, worked very well.  I bet those 75s would be sweet on yotes and other small game.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: July/06/2010 at 16:07
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Chief Sackscratch

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So far they have impressed me with recovered weight in sand bags.  I have used the 208gr with good luck in my 300 winny too but this is the first I have in a .224 bullet with a tip that I am really wanting to work!
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: July/07/2010 at 01:10
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Berger Bullets' blog has a relevant discussion about a seating technique you might try: http://02b0516.netsolhost.com/blog1/?p=43

The reason I recommend that is because the two bullets you're using are different enough in shape and construction that just trying to match the seating depth of the match bullet won't necessarily help. The AMAX is longer and has a more secant ogive. I'd use the recommendations for hunting bullets in that article. Really what you'd be doing then is performing a ladder test of sorts. (Usually, a ladder test is achieved by varying the powder charge. Then, perhaps, adding a little seating depth variation).

I don't know what the twist rate is on your barrel, but I'd certainly try to go with the heavies like you are, especially in a small caliber like that. You might even try the 80-gr. AMAX. There's not much else out there if you want a hunting bullet in that caliber.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: July/14/2010 at 17:46
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Graham I have seen the same results in my SAv 223 also.  The HPBT Match quite simply out perform the Amax.  Since I didn't have a Sinclair I likely necksized a casing so thaty I could press the bullet in with my fingers without too much difficulty.  I then cycled the round letting the throat push the bullet into the casing.  After removing the round I measured teh COAL with calipers then pressed bullet in another 0.02"  Man was that a long bullet!  won't fit into the mag but it did shoot better then pressing to factory COAL!
Gotta get me thoses Sinclairs!!!
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