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Rifle question for hunters


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#1 TxBrewer

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Posted 16 November 2020 - 11:49 AM

I have been shooting 150 grain in my 270 since I bought the rifle, I am down to one and a half boxes of bullets and I can't find anymore anywhere.   The local pawnshop has a bunch of 130 grain for the 270 and they aren't price gouging people which is nice.    I was thinking about grabbing four of five boxes going to the range and checking zero on the 130's at 100yards and converting to the lighter bullet.

 

With a conversion like this to a lighter bullet it should shoot faster and flatter according the the ballistics chart out to 160 it should shoot pretty much identical.  Anyone make a similar change or have to move from one to the other and have any real world experience on what to expect?

 

balcalc_chart_1605552409.png


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#2 SnowMan

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Posted 16 November 2020 - 11:58 AM

130 grain should be plenty to get the job done on white tail.  My boy shot his over the weekend with 80 grain hornady GMX

 

Until you get to very long ranges, I don't think you'll notice a bit.  Might shoot a tiny bit higher due to the lighter bullet having a flatter trajectory.  


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#3 TonyBrown

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Posted 16 November 2020 - 12:07 PM

I went to lighter/faster on my 7mag, shoots a touch high at 200 with the 139g, about half an inch-ish.  I went from a 154g down to 139g.  realistically, if you're not shooting BIG distance you're probably gonna still be in the pie plate.

 

I can't speak specifically to the 270 though, compare it to chart of your 150g rounds and you should be able to use a little kentucky windage to adjust until you get some range time.


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#4 AspenLeif

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Posted 16 November 2020 - 01:27 PM

Huh, even ammoseek isn't picking up anything other than 130g


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#5 pods8

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Posted 16 November 2020 - 01:55 PM

It’ll initially be flatter but as the likely lower BC scrubs off velocity it’ll eventually start dropping faster but talking out hundreds of yards.

Yes I shoot two different loads in guns, my 300wsm I have a 181gr mono and a 208gr lead core load. Both are programmed into a ballistic app with the zero offsets (IE the gun is zero’d at 100yd for the 181 and the slight offset for where the 208 hits at 100yds is input so the app knows how to correct). Keep in mind this is for fat shots and I have the velocity, BC, etc all worked out on these. Inside 200yd is point and shoot.
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#6 miccullen

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Posted 17 November 2020 - 01:07 PM

no substitute for range time IMO, what 130gr load is it? It could shoot several inches off from the poitn of aim of your zero'd load.

 

130gr will kill anything smaller than an elk with no issues, as long as you put it where it's supposed to go.

 

I personally shoot 140gr Nosler accubonds


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#7 TonyBrown

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Posted 17 November 2020 - 01:08 PM

no substitute for range time IMO, what 130gr load is it? It could shoot several inches off from the poitn of aim of your zero'd load.

 

130gr will kill anything smaller than an elk with no issues, as long as you put it where it's supposed to go.

 

I personally shoot 140gr Nosler accubonds

I've always been a big fan of Nosler projectiles


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#8 pods8

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Posted 17 November 2020 - 03:40 PM

I hunt monos, have killed dozens of critters with the Barnes TTSX/LRX, trying out some different monos in my 300wsm.
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#9 Stout_fan

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Posted 17 November 2020 - 04:42 PM

It all depends upon where your barrel resonates. For  that you need to chrono the loads and do a SD.

There is no easy way out. Sorry.


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#10 pods8

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Posted 17 November 2020 - 06:37 PM

It all depends upon where your barrel resonates. For that you need to chrono the loads and do a SD.
There is no easy way out. Sorry.


He’s running factory ammo, it is what it is.
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#11 Stout_fan

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Posted 20 November 2020 - 11:02 PM

The only folks that can get away doing that is the USMC Rifle Team.


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#12 TxBrewer

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Posted 21 November 2020 - 02:41 PM

It ended up shooting 1.5 inch higher @75 yards.
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#13 miccullen

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Posted 21 November 2020 - 08:48 PM

It ended up shooting 1.5 inch higher @75 yards.

sounds about right


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