Amax load for a 99

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vegas
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Amax load for a 99

Postby vegas » Mon 05 Jul, 2010 9:29 pm

I finally have my 50bmg loading setup operational. Normally this is about the time i start load development for the particular rifle and round to find the sweet spot. With the Amax at 2bucks a pill, a proper load development work up is not feasible at this time. In other words id like to hear what others use as a base in their M99 32". I started with a 5.5coal with 220 H50bmg, 13 grains under max. I hope to test them out this next weekend. Once i have found a load the rifle loves its off to push my limits and try for a few 2000 meter hits.

I noticed Hog had a 5.9coal on some of his loads and i remember seeing a 200gr light load some where here in the past. Im curious how those preformed.

I will post results and velocity when i can... still waiting on chrony parts, one of the guys i go shooting with tried to sacrifice it. :owned:


Thanks
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Re: Amax load for a 99

Postby vegas » Tue 13 Jul, 2010 1:25 pm

**update**
Amax load testing delayed for several weeks due scope being sent back to Nightforce.


Blue tipped incendiaries fire just fine out of Hog's Barrett 99. We took 5 of those out to a night shoot, they made quite a flash and an fairly loud report even back at 1100 yards.


I believe its the spotter tracers you need to be cautious firing out of breaked or suppressed rifles.
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Re: Amax load for a 99

Postby vegas » Wed 14 Jul, 2010 10:41 am

My bad, i didn't see a similar post a year ago. here is one of the replies

flyjets wrote:I use CCI #35 Primers

Barrett Brass or IMI

Hogden H50BMG Powder 230 Gr

750 AMAX seated to 5.700

Tack Drivers tested only to 1000 yards

If I recall Budda had posted this on the old website.

Ian
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Re: Amax load for a 99

Postby flyjets » Sat 17 Jul, 2010 6:48 pm

Well here is what my M99 absolutely shoots best.

5.770 Oal
220 Grains of H50
CCI #35 Primer

IMI Brass

I am able to shoot at .4 MOA with this load at 565 yards.

I haven't measured the accuracy at 1000 yards.

Ian
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Re: Amax load for a 99

Postby vegas » Mon 02 Aug, 2010 9:53 am

Finally ran some round through the chrono this weekend. Unfortunately it wasn't exactly to my liking.

5.5coal, 220 H50bmg 750gr amax- Only achieved 2510-2540 fps, far slower than the 2700-2750 than the BVAC loaded Amaxes Hog was shooting. I was not in the best shape to shoot groups but i did connect all 5 with the target at 500m... thats not saying much.


FYI
1/2" Ar500 steel holds up to Amax rounds at 500m without even a scratch or dent.

Next up is something closer to Flyjets load.
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Re: Amax load for a 99

Postby RFmissile » Mon 02 Aug, 2010 10:08 am

flyjets wrote:Well here is what my M99 absolutely shoots best.

5.770 Oal
220 Grains of H50
CCI #35 Primer

IMI Brass

I am able to shoot at .4 MOA with this load at 565 yards.

I haven't measured the accuracy at 1000 yards.

Ian


Hey Ian,

How far off the lands are you with that C.O.L? Are you using a comparator to seat the bullets?
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Re: Amax load for a 99

Postby flyjets » Mon 02 Aug, 2010 8:51 pm

RF Missle

The 50BMG Lake City Brass or Barrett IMI with a 750 AMAX will touch the lands in my chamber at 5.780.

I found if I seat them at 5.770 my M99 shoots it's best accuracy at .4 MOA

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Re: Amax load for a 99

Postby RFmissile » Tue 03 Aug, 2010 10:09 am

Ian,

Thanks for the info. I haven't measured yet how far mine is to the lands yet.

I was planning on starting at 0.020" off the lands and work down to 0.010"

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Re: Amax load for a 99

Postby Hognuts » Mon 11 Oct, 2010 5:01 pm

I loaded up some AMAX using the recipe off of the H50 bottle with 233 grains of the H50...dont recall the overall length, but they chrono'd at between 2670-2700 fps...and I connected on a mile target with one of the LUCKIER ones.. :rofl: I also loaded up some of the Barnes solids...I know that we had talked about that on here before and that they are NOT reccommended for the Barrett, but my dumb *** had bought 100 of their projectiles so I wanted to throw them down range at something! I also used the recipe off the h50 bottle on those with 225 grains of H50...they chrono'd at 2450 - 2500...I had my BORS programmed with the AMAX at 2750 fps...but the Barnes was not far off as far as elevation at 1090 yards. (they did have a slightly lower poi, but not as much as I would have thought...I think that I had BORS turned to 1110 yards at 1090 and was getting hits on the elk target and the 3' square)

BTW with the handloaded AMAX at the 1 mile spot I dialed the BORS to 1800 yards with the rounds chrono'ing at 2700 and it was DEAD NUTS as far as elevation is concerned! That may be useful to any BORS guys out there IF you are shooting in similar conditions and IF your muzzle velocity is the same.

I cant seem to get the FULL 2750 fps out of my handloads for the AMAX...dont know if I should TRY to add 1 grain at a time to get to a max load...or if it aint broke dont fix it...I guess I could just reprogram the BORS to my velocity...but I would really like to get 2750 out of it...I think it will make a difference on the extreme long stuff down the road....any thoughts??? :conf:
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Re: Amax load for a 99

Postby stevie_d_64 » Mon 04 Apr, 2011 9:28 am

We are already looking at getting a reload operation going, and so far the OAL, primers and powder seem to be about the same amoungst the learned people on this thread...

I gathering info, and if somone has a trusted provider they go to for the bullets, I think I can whip up a batch with the cases I have on hand now and see what I can contribute to the conversation...

I'm trying to see if humidity will be a real factor on these recipes for this caliber that I am new to, as much as the other environmental factors do...Most of my testing will be in the S.E. Texas area, and it is not only the temperature, winds (environmentals) that I believe will affect accuracy at the ranges I want to shoot at down our way...

Sorry to appear to cut to the chase right off the bat, but I am one of those folks that likes to get to the store, go right to the aisle to get the stuff I know I need, get back to the house, whip it up, and get it to the range...I also know this is a caliber that can be expensive, so if I can tap the knowledge base a little bit, the economy of effort will pay off in a more cost effective and time effort manner...

It's just the way I approach things like this...

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Re: Amax load for a 99

Postby Hognuts » Mon 04 Apr, 2011 12:11 pm

I have been buying my stuff from Midway USA, But I believe Vegas was able to find a different source for the AMAX projectiles that were a little cheaper than what I was getting them for. But if you are looking for quick, Midway usually has the goodies in stock and ready to ship. In fact I just loaded up 60 rounds of Barnes solids (not my favorite, but I had bought 100 rounds of projectiles some time back and they fly alright, but I like the AMAX better) and I am scraping the bottom of the barrel on powder, just about time for me to do another order for BMG supplies as well, another batch of primers, powder, and AMAX projectiles!!! :headbang:
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Re: Amax load for a 99

Postby flyjets » Mon 04 Apr, 2011 6:36 pm

Accuracy Update

I would never believe that the stock Barrel with it's long chamber could shoot this good.

I sorted the cases and weighted them
Turned the Necks
Used CCI 35 primers
H50 220 GR
Weighted the 750 gr AMAXs
5.770 COAL

This produced a five shot .329 group at 100 yards
At 565 she was running .4 MOA
At 1000 yards the group opened up to 1 MOA.

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Re: Amax load for a 99

Postby Hognuts » Mon 04 Apr, 2011 9:33 pm

Nice shooting!
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Re: Amax load for a 99

Postby ersc » Tue 21 Jun, 2011 9:52 pm

I am starting to use 50 BMG AMAX bullets...

I would like to establish a "Cartridge Overall Length" for my M99...

Made a gauge to measure the distance between the end of the case (rim) to the ogive of the bullet in contact with the shoulders of the barrel lands.

The measured distance is 5.754...

How much do you folks back-off 5.754 to establish "Cartridge Overall Length"...

I have read about a back-off of .015 which be 5.739???

Since the M99 is a bolt action seating to .412 / 5.414 / 5.417 seems like a lot of free space???

My main concern is being too close and having pressure spikes...

Thanks
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Re: Amax load for a 99

Postby flyjets » Wed 22 Jun, 2011 7:06 am

ERSC

Measure it one more time just to be sure.

I start the AMAX jumping Ten thousands.

My Chamber measured 5.780 to the Amax was jammed into the lands.

I run my Amax at 5.770 COAL.

Quick load shows no over pressure sign what so ever on the program for the load I posted earlier on this thread.

Ian
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