anyone measure the ogive on the 168gr amax bullet?
if so do you find that they vary in length a lot within a box of a 100
if so do you find that they vary in length a lot within a box of a 100
168gr AMAX
- Thread starter perazzisc3
- Start date
Re: 168gr AMAX
Never measured them. always loaded em, and got 1/2, to 3/4 in. groups, at 100, through my 5R. I use the Hornady oal ogive gauge, to start, with the competition RCBS dies. Figured that "handled" the length, to the ogive, and the hold off, at the lands. I hold back 1 to 1.5 thousands.
Never measured them. always loaded em, and got 1/2, to 3/4 in. groups, at 100, through my 5R. I use the Hornady oal ogive gauge, to start, with the competition RCBS dies. Figured that "handled" the length, to the ogive, and the hold off, at the lands. I hold back 1 to 1.5 thousands.
Re: 168gr AMAX
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: perazzisc3</div><div class="ubbcode-body">anyone measure the ogive on the 168gr amax bullet?
if so do you find that they vary in length a lot within a box of a 100 </div></div>
Yes. I get 0.6495" base to ogive. No I have seen virtually no variation in ogive height across several boxes of 100 and 250. These are the newer AMP process bullets which are MUCH more consistent than the original lots of 168gr A-MAX bullets I bought when they first came out. The old 168gr A-MAX were all over the place.
These are my go-to bullet for out to 1,000 yards. They shoot extremely well out of my stock action/barrel 5R/AICS rifle. I can nail 0.2 mil size targets cold bore at 800 yards with these buggers and they stay supersonic well past 1,150 yards.
Hope this helps!
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: perazzisc3</div><div class="ubbcode-body">anyone measure the ogive on the 168gr amax bullet?
if so do you find that they vary in length a lot within a box of a 100 </div></div>
Yes. I get 0.6495" base to ogive. No I have seen virtually no variation in ogive height across several boxes of 100 and 250. These are the newer AMP process bullets which are MUCH more consistent than the original lots of 168gr A-MAX bullets I bought when they first came out. The old 168gr A-MAX were all over the place.
These are my go-to bullet for out to 1,000 yards. They shoot extremely well out of my stock action/barrel 5R/AICS rifle. I can nail 0.2 mil size targets cold bore at 800 yards with these buggers and they stay supersonic well past 1,150 yards.
Hope this helps!
Re: 168gr AMAX
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: hithard</div><div class="ubbcode-body"> What are you loading them with that you can get them out that far, barrel length?
Thanks, </div></div>
This load was chrono'd over a PVM21 chrono and fired from from a stock Remington 5R receiver & 24" barreled action in an AICS chassis.
The load itself is some 40 year old R&P brass with primer pockets uniformed using Sinclair primer uniformer and Sinclair flash hole uniformer and deburr tools. Cases were neck sized by a Redding Competition bushing die and then final neck sized and F/L sized to net 0.0015" headspace for my 5R by a Redding Type S Match F/L bushing die then trimmed to 2.005". The Hornady 168gr AMAX bullets we seated using a Redding Competition bullet seater with a max. COAL of 2.810" over 44.1gr of IMR 4895.
This load showed a ten shot string average of 2,730fps at 1,500ft with 70F air temp. The chrono data is pretty reliable as my dial-ups for 200, 400, 600, 800 and 1,000 yards are all perfect using JBM's calculator. This round is supersonic all the way past 1,170 yards.
Hope this helps!
BTW, I also have a batch of newer BHM (Win) brass prepped the same way but these cases need 44.7gr of IMR 4895 for the about the same of maybe a few feet more velocity. But using 47.9gr of RL-17 netted me 20fps+ but I don't like how that loads shoots out of my 5R as well.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: hithard</div><div class="ubbcode-body"> What are you loading them with that you can get them out that far, barrel length?
Thanks, </div></div>
This load was chrono'd over a PVM21 chrono and fired from from a stock Remington 5R receiver & 24" barreled action in an AICS chassis.
The load itself is some 40 year old R&P brass with primer pockets uniformed using Sinclair primer uniformer and Sinclair flash hole uniformer and deburr tools. Cases were neck sized by a Redding Competition bushing die and then final neck sized and F/L sized to net 0.0015" headspace for my 5R by a Redding Type S Match F/L bushing die then trimmed to 2.005". The Hornady 168gr AMAX bullets we seated using a Redding Competition bullet seater with a max. COAL of 2.810" over 44.1gr of IMR 4895.
This load showed a ten shot string average of 2,730fps at 1,500ft with 70F air temp. The chrono data is pretty reliable as my dial-ups for 200, 400, 600, 800 and 1,000 yards are all perfect using JBM's calculator. This round is supersonic all the way past 1,170 yards.
Hope this helps!
BTW, I also have a batch of newer BHM (Win) brass prepped the same way but these cases need 44.7gr of IMR 4895 for the about the same of maybe a few feet more velocity. But using 47.9gr of RL-17 netted me 20fps+ but I don't like how that loads shoots out of my 5R as well.
Re: 168gr AMAX
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Thor2j</div><div class="ubbcode-body">Supersonic is not what u need to worry about,it's transonic. .8-1.2 Mach where aerodynamics start causing issues.
That load is probably going to go subsonic around 1050 and transonic well before. </div></div>
I think going transonic with the 168gr A-MAX bullet is not as bad as going transonic with 168gr SMK bullet based on how much better the 168gr A-MAX works past 800-900 yards than the 168gr SMK at the same velocity. I think the 168gr SMK is becoming unstable past 800-900 yards. The 168gr SMK is not as consistent and the JBM dial-ups are not reliable like they are for the 168gr A-MAX which suprisingly remain exactly as predicted by JBM out to 1,200 yards. Transonic or not the trick is to hit your target which is still reliable with the 168gr A-MAX at 1,000 yards with this load out of my stock action 5R.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Thor2j</div><div class="ubbcode-body">Supersonic is not what u need to worry about,it's transonic. .8-1.2 Mach where aerodynamics start causing issues.
That load is probably going to go subsonic around 1050 and transonic well before. </div></div>
I think going transonic with the 168gr A-MAX bullet is not as bad as going transonic with 168gr SMK bullet based on how much better the 168gr A-MAX works past 800-900 yards than the 168gr SMK at the same velocity. I think the 168gr SMK is becoming unstable past 800-900 yards. The 168gr SMK is not as consistent and the JBM dial-ups are not reliable like they are for the 168gr A-MAX which suprisingly remain exactly as predicted by JBM out to 1,200 yards. Transonic or not the trick is to hit your target which is still reliable with the 168gr A-MAX at 1,000 yards with this load out of my stock action 5R.
Re: 168gr AMAX
Good for you, my 168 amax loads suck balls past 800 in both my bolt guns you got yourself a shooter!
Good for you, my 168 amax loads suck balls past 800 in both my bolt guns you got yourself a shooter!
Re: 168gr AMAX
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: bcrich</div><div class="ubbcode-body">Good for you, my 168 amax loads suck balls past 800 in both my bolt guns you got yourself a shooter! </div></div>
Have you chron'd your 168gr A-MAX loads over a good chronograph? They might just be too slow to make it that far. I can get another 20fps+ using RL-17 but they don't seem to shoot as well.
HTH!
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: bcrich</div><div class="ubbcode-body">Good for you, my 168 amax loads suck balls past 800 in both my bolt guns you got yourself a shooter! </div></div>
Have you chron'd your 168gr A-MAX loads over a good chronograph? They might just be too slow to make it that far. I can get another 20fps+ using RL-17 but they don't seem to shoot as well.
HTH!
Similar threads
