Home Forums Hunting & Shooting Deer Hunting Any difference: .308, Sierra 150 BTSP vs Speer 150 BTSP

Is there a difference accuracy, terminal ballistics wise between the two?

Both look identical to each other.

My exp is that the Sierra's tend to be more accurate but I'd shoot a deer with either one and not think twice.

Here are 3 consecutive groups using the 150gn Sierra BT in my Featherweight. Please note that the particular batch of 760 was very slow and I have never seen another that slow since.

150gn Sierra BT
Win 760 3049fps .849" 5 shots
same load 3078fps .842" 5 shots
same load 3085fps .551" 5 shots

I also used the Speer BT with the same loads for similar groups but at that particular time, the Speer was a very soft bullet, though it killed deer sized game very consistently.

When I started handloading, the Speer was the hardest bullet of the big 4.

John

You may be interested to know that these groups were fired back to back, with a few minutes between to let the barrel cool a little.
JW

Used them interchangeably for years. The Sierra may have had a slight edge in accuracy but it was more a feeling than a fact. Neither one ever let me down. Only changed to Barnes because Calif required unleaded.

I know the question was about BTSP but I have used the flat based version of both on deer, and the speer definetely held together better in my 30-06. The sierra was 1/4 inch better accuracy wise, but both very accurate with 52 of 4064.

There's more difference between the flat base and boat tail Speers than just the base. The flat base is a Hot Cor, the boat tail is a conventional swaged core and jacket. The boat tail is deliberately of lighter/softer construction. So when the boat tail versions of the Sierra and Speer are compared, you may well find the results are reversed from the flat base comparison.

Any difference that doesn't make a difference , isn't a difference.

In my area and experience, the biggest difference is the availability of the bullets.

I don't know what the issue is, but Speer bullets have been far and few between for years now, and Sierra and Hornady have been in good supply.

My friend uses the 150gr Speer BTSP with very good results in his 308 so it requires some effort to get bullets for him at times.

Do you understand Lebesgue integration and Lp spaces?

Understand it?
does a bear chit in the popes hat?