270win ABLR Abolt browning

[Trawick78]

Okay guys so I’m just getting into reloading I have a 1991 browning Abolt hunter 270win I got some noslar brass and some 150grain ABLR the only primers I had available was CCI 200 an the powder I was able to get was Accurate 4350, I can’t find any load data for that mix anywhere what would be a safe starting point to work the load up?

 

[DrMike]

Try this:

Cartridge          : .270 Win. (SAAMI)
Bullet             : .277, 150, Nosler Accubond LR 58836 G7
Useable Case Capaci: 58.520 grain H2O = 3.800 cm³
Cartridge O.A.L. L6: 3.340 inch = 84.84 mm
Barrel Length      : 22.0 inch = 558.8 mm
Powder             : Accurate 4350

Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step    Fill. Charge   Vel.  Energy   Pmax   Pmuz  Prop.Burnt B_Time
 %       %    Grains   fps   ft.lbs    psi    psi      %        ms

-10.0   88    47.25   2601    2253   45501  11235     99.1    1.305
-09.0   89    47.78   2629    2302   47037  11329     99.3    1.284
-08.0   90    48.30   2657    2352   48625  11417     99.5    1.264
-07.0   90    48.83   2686    2402   50266  11500     99.6    1.244
-06.0   91    49.35   2714    2453   51962  11577     99.8    1.225
-05.0   92    49.88   2742    2504   53715  11648     99.9    1.205
-04.0   93    50.40   2770    2555   55529  11714     99.9    1.187  ! Near Maximum !
-03.0   94    50.93   2798    2607   57404  11773    100.0    1.168  ! Near Maximum !
-02.0   95    51.45   2825    2659   59344  11827    100.0    1.150  ! Near Maximum !
-01.0   96    51.98   2853    2711   61351  11878    100.0    1.133  ! Near Maximum !
+00.0   97    52.50   2881    2764   63428  11927    100.0    1.116  ! Near Maximum !
+01.0   98    53.03   2908    2816   65579  11976    100.0    1.099  !DANGEROUS LOAD-DO NOT USE!
+02.0   99    53.55   2935    2870   67805  12023    100.0    1.082  !DANGEROUS LOAD-DO NOT USE!
+03.0  100    54.08   2962    2923   70111  12070    100.0    1.066  !DANGEROUS LOAD-DO NOT USE!
+04.0  101    54.60   2989    2976   72500  12115    100.0    1.050  !DANGEROUS LOAD-DO NOT USE!
+05.0  102    55.13   3016    3030   74976  12160    100.0    1.034  !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 10% relative to nominal value:
+Ba     97    52.50   2988    2975   76474  11455    100.0    1.030  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba     97    52.50   2717    2458   50587  12230     97.9    1.232

The CCI200 primers will be just fine for what you are doing. You may have some difficulty getting precise accuracy with the ABLR, as they can be a bit fussy. Nevertheless, they will work if you take the time to find the sweet spot with them.

Welcome aboard. Glad to see you posting here. Let us know how the load works out for you.

 

[Trawick78]

Thank you buddy

 

[JD338]

Thank you buddy

Let us know how your load development goes.

JD338

 

[Trawick78]

Wi

Let us know how your load development goes.

JD33

Let us know how your load development goes.

JD338

will do buddy

 

[Trawick78]

Try this:

Cartridge          : .270 Win. (SAAMI)
Bullet             : .277, 150, Nosler Accubond LR 58836 G7
Useable Case Capaci: 58.520 grain H2O = 3.800 cm³
Cartridge O.A.L. L6: 3.340 inch = 84.84 mm
Barrel Length      : 22.0 inch = 558.8 mm
Powder             : Accurate 4350

Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step    Fill. Charge   Vel.  Energy   Pmax   Pmuz  Prop.Burnt B_Time
 %       %    Grains   fps   ft.lbs    psi    psi      %        ms

-10.0   88    47.25   2601    2253   45501  11235     99.1    1.305
-09.0   89    47.78   2629    2302   47037  11329     99.3    1.284
-08.0   90    48.30   2657    2352   48625  11417     99.5    1.264
-07.0   90    48.83   2686    2402   50266  11500     99.6    1.244
-06.0   91    49.35   2714    2453   51962  11577     99.8    1.225
-05.0   92    49.88   2742    2504   53715  11648     99.9    1.205
-04.0   93    50.40   2770    2555   55529  11714     99.9    1.187  ! Near Maximum !
-03.0   94    50.93   2798    2607   57404  11773    100.0    1.168  ! Near Maximum !
-02.0   95    51.45   2825    2659   59344  11827    100.0    1.150  ! Near Maximum !
-01.0   96    51.98   2853    2711   61351  11878    100.0    1.133  ! Near Maximum !
+00.0   97    52.50   2881    2764   63428  11927    100.0    1.116  ! Near Maximum !
+01.0   98    53.03   2908    2816   65579  11976    100.0    1.099  !DANGEROUS LOAD-DO NOT USE!
+02.0   99    53.55   2935    2870   67805  12023    100.0    1.082  !DANGEROUS LOAD-DO NOT USE!
+03.0  100    54.08   2962    2923   70111  12070    100.0    1.066  !DANGEROUS LOAD-DO NOT USE!
+04.0  101    54.60   2989    2976   72500  12115    100.0    1.050  !DANGEROUS LOAD-DO NOT USE!
+05.0  102    55.13   3016    3030   74976  12160    100.0    1.034  !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 10% relative to nominal value:
+Ba     97    52.50   2988    2975   76474  11455    100.0    1.030  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba     97    52.50   2717    2458   50587  12230     97.9    1.232

The CCI200 primers will be just fine for what you are doing. You may have some difficulty getting precise accuracy with the ABLR, as they can be a bit fussy. Nevertheless, they will work if you take the time to find the sweet spot with them.

Welcome aboard. Glad to see you posting here. Let us know how the load works out for you.

So I’m abt to start loading now an I see on the chat it says caution data exceeds max load an minimum load an it shows the load that is maximum not to pass but it doesn’t show we’re the minimum load is?

 

[Joec7651]

The rule is reduce the maximum Safe charge by 10% and work up. According to the Quickload output the max charge will be roughly 52.6 grains. Subtract 5.26 grains from 52.6 and start there. That gives you ample room to increase the charge to your rifles max load. That 10% reduction gives a starting point that will be safe in all 270 Winchester’s. If they are in proper working order. Work up from there until you start to see pressure signs. When I see the first pressure indication, I back off .5 grain and that’s my rifles safe maximum load. It may not be the most accurate load but it is the max with that powder in my rifle. Your rifles max charge will likely be different than mine. All rifles have a personality all their own.

 

[Trawick78]

Okay thanks, I’ve read cover to cover on several reloading books an I learn something new everyday just researching, I just wanted to make sure that I have everything right on this first batch an go from there, I just seated a dummy round, I checked my OAL with a Hornady gage an comparator witch I found the lands at 2.832 I ended up having to seat the bullet at 2.755 so they would fit in the magazine. So that will be .077 jump to the lands I might be able to make them fit in the clip at 2.760. I measured the Coal an I was at 3.355. So we shall see I plan on going shoot tommarrow if I finish loading these test rounds

 

[AFG270]

Good luck! Don't get frustrated if you can't get those ABLR bullets to shoot good groups. I tried them when they first came out in my 270 wsm and never could get them to group. There are other .277 bullets available if those don't work out. https://www.shootingbot.com/shooting/items/bullets/270
Some 130 or 140gr SP would probably be easier to get to shoot for you.

Those A-bolts are good shooting rifles, I had one in 270 Win several years ago and like a fool sold it to buy a 270 wsm.

 

[Trawick78]

Well guys I went an shot today an only got halfway through the load data when I noticed pressure signs at 49.9 I started seeing ejector marks so I stopped all together when I saw that I just check the head space on all the brass an it hasn’t changed none. I had 2.044 on the new brass an still have 2.044 on the brass with the ejector marks, so I think that would be why I had pressure. And I’m gunna asumme that’s why the bullets was flying wild to lol

 

[Trawick78]

Anyone have any advice our see we’re I went wrong please let me know

 

[DrMike]

I'm fighting off a virus, so I'm not following anything as closely as I might otherwise do. It is not obvious to me that you have ejector marks on your brass. Did you by chance chronograph your loads? The velocities, while not a precise correlation with pressure, does give you an approximation. It isn't clear that you have done anything wrong. The soot on the case necks might indicate that you have a load developing a low pressure which permits blow-back. If your neck is not jammed into the lands, you should have no problem with pressure at those charge weights.

The poor accuracy of the load may have far less to do with your own loads than it reflects the nature of the ABLR. That particular bullet can be fussy. What is usually evident is that as you approach maximum charges, groups tighten. I know it can be intimidating to work with those initial loads, but it isn't immediately evident that you are doing anything wrong. I have found in the few loads I worked up and use with the ABLR, you have to allow a goodly jump to the lands. In my 280, I allow 0.100 inches measuring from the ogive.

If I'm not checking in more frequently, I'm certain that others will give you good guidance. Hopefully, I'll be back in my groove within the coming week.

 

[Trawick78]

I hope you heal well an that virus don’t get you down to bad! An that nic right under the 2 isn’t an ejector mark?an no sir I don’t have a chronograph, but I did notice that I was actually hearing the bullet hit a split second after I shot witch I do t recall ever hearing shooting factory loads, an my bolt was a little bit more than normal but it wasn’t any were close to being hard to open, an I’m jumping .077 to the lands with them, I’m just tryna be a careful as I can be bc I have nobody that can ride over to my house an help me I’m depending on reloading books an load data an yall to help me learn this.so you think that I should keep working up to that max load our i should stop we’re I’m at an work with it there

 

[sako2]

Looks like scratches on the shoulder. I think i see it on a unfired round in the box. Chamber a unloaded case and look for a scratch. Could be a piece of dirt in your chamber

 

[RL338]

Anyone have any advice our see we’re I went wrong please let me know

Now I see were the other pictures are. If you look at the second picture there is a loaded round that has the same scratch in the shoulder. Those scratches were on the brass before firing.

 

[jimbires]

the scratch on the brass shoulders is probably from the Hornady measuring tool . that's about where it will ride on the shoulder .

 

[jimbires]

your fired brass not growing in length after being fired is a sign of lower pressure , the pressure is not high enough to expand the brass . these lower pressure loads can give some weird brass and primer signs . it looks like 52.5 grains is the max load . I would start 4.0 grains below max as my minimum . I would be working 48.5 min - 52.5 max .
if you have a neck sizing die I would use that until you get your brass to fully expand . you can tell when it's fully expanded , the bolt will be a little tight when chambering your ammo . after you get the brass to this point , then you can set up your full length die to properly resize the brass case . if you don't have a neck sizing die , you can use the full length die by raising it up about 1/8 of a turn . this will allow your brass to be about .009" longer . try to chamber an EMPTY resized brass case to be sure it fits, BEFORE you load them up .if it doesn't fit , or it's tight to chamber just turn the die down a very little smidge at a time until it fits . when using the full length die adjusted up like this , it is normal to have the brass case get longer after sizing . this is why we check for fit before going any further .

the ABLR bullets are very finnicky . you might want to give the Berger bullet seating depth method a try with these .

Getting the Best Precision and Accuracy from VLD bullets in Your Rifle

VLD bullets are designed with a secant ogive. This ogive shape allows bullets to be more efficient in flight (retain more velocity = less drop and wind deflection). While this result is desirable for many rifle shooters the secant ogive on the VLD bullets produces another result in many rifle.

bergerbullets.com

you said 2.755" is about your max cartridge length giving a .077" jump .

lets load three rounds at 2.755" , three at 2.715" , three at 2.675" , three at 2.635" . lets shoot these 4 groups on separate targets and see what looks best . let us know when how you make out .

if you have any questions just ask .

 

[Trawick78]

your fired brass not growing in length after being fired is a sign of lower pressure , the pressure is not high enough to expand the brass . these lower pressure loads can give some weird brass and primer signs . it looks like 52.5 grains is the max load . I would start 4.0 grains below max as my minimum . I would be working 48.5 min - 52.5 max .
if you have a neck sizing die I would use that until you get your brass to fully expand . you can tell when it's fully expanded , the bolt will be a little tight when chambering your ammo . after you get the brass to this point , then you can set up your full length die to properly resize the brass case . if you don't have a neck sizing die , you can use the full length die by raising it up about 1/8 of a turn . this will allow your brass to be about .009" longer . try to chamber an EMPTY resized brass case to be sure it fits, BEFORE you load them up .if it doesn't fit , or it's tight to chamber just turn the die down a very little smidge at a time until it fits . when using the full length die adjusted up like this , it is normal to have the brass case get longer after sizing . this is why we check for fit before going any further .

the ABLR bullets are very finnicky . you might want to give the Berger bullet seating depth method a try with these .

Getting the Best Precision and Accuracy from VLD bullets in Your Rifle

VLD bullets are designed with a secant ogive. This ogive shape allows bullets to be more efficient in flight (retain more velocity = less drop and wind deflection). While this result is desirable for many rifle shooters the secant ogive on the VLD bullets produces another result in many rifle.

bergerbullets.com

you said 2.755" is about your max cartridge length giving a .077" jump .

lets load three rounds at 2.755" , three at 2.715" , three at 2.675" , three at 2.635" . lets shoot these 4 groups on separate targets and see what looks best . let us know when how you make out .

if you have any questions just ask .

Gunna load them up tomorrow when I get off work will probably be Tuesday before I shoot again, won’t have very much time to let my barrel cool if I load them tomorrow an try to shoot tomorrow. It’ll probably take 10-15 mins for my barrel to cool down enough to shoot another 3 rounds as hot as it is right now

 

[wvbuckbuster]

Gunna load them up tomorrow when I get off work will probably be Tuesday before I shoot again, won’t have very much time to let my barrel cool if I load them tomorrow an try to shoot tomorrow. It’ll probably take 10-15 mins for my barrel to cool down enough to shoot another 3 rounds as hot as it is right now

I use an air mattress pump with a piece of hose that I stick into the chamber then blow air through the bore. Helps cut down on the cooling time on hot days. Dan.

 

[sako2]

I use an air mattress pump with a piece of hose that I stick into the chamber then blow air through the bore. Helps cut down on the cooling time on hot days. Dan.

That's how do it. But i took old cooler and put a coil of soft cooper in and fill it with ice. Blows through the coil into the chamber.