flat base 7mm sierras

[shooterxtc]

Does anyone have experience with flat base bullets for chickens,pigs,and turkeys.I have always used boatail bullets.

[Bob Mc Alice]

I have sent thousands of 140 gr.Sierra pro hunter flat base bullets down range with RL-15 in a Ruger 7x57. I still use many when out practicing with my 7-08's. They work well at knocking down the CPT targets and our rams fall most of the time. The performance difference of a boat tail vs. flat base is negligible out to turkeys. Just recently I picked up 10 pounds each of 140gr. pro's and game king blems from Sierra while traveling to St. Louis last month. Great bullets, accurate and cheap fun.

[edgehit]

I've been using 120gr HP Hornady with success on C-P-T. They're not as cheap as McAlice's deal. But my shipping cost is a lot less! They're accurate and lower priced than many other bullets

[Snake]

If its any comfort...boattails allegedly yaw and don't completely stabilize until they're past 300 m.....that's why the bench resters generally use flat base out to 300....it has something to do with turbulence behind the boat-tail You might also mike match bullets and hunting bullets.....hunting bullets are slightly smaller in diameter because of the heavier jackets they have less give when swaging through the rifling. Theoretically one can drive the hunting bullets hard with less pressure signs

[Jerry G]

"Theoretically one can drive the hunting bullets hard with less pressure signs"

I'm not sure I buy that theory. The harder it is to push a bullet down the bore, the higher the pressure is going to be. Molly bullets will develope less pressure than non-coated bullets.

The best way to decrease peak pressure is to use a slower burning powder.

[Trent]

"Theoretically one can drive the hunting bullets hard with less pressure signs"

I'm not sure I buy that theory. The harder it is to push a bullet down the bore, the higher the pressure is going to be. Molly bullets will develope less pressure than non-coated bullets.

The best way to decrease peak pressure is to use a slower burning powder.

I think Snake is saying that since the hunting bullets are smaller in diameter than target bullets that they develop less pressure. I'll have to check some of my hunting bullets with a caliper and see. I don't remember them being any smaller. Maybe a mic is needed to read it.

[Bob Mc Alice]

Here is some scientific data for you armchair ballistic nerds to digest.




Hey, it is pouring rain here STILL !!! What is a feller supposed to do when confined indoors? The flooding continues further down stream, this is going to be big problem for a few days. The sun may reappear this Tuesday.

[Jim Beckley]

Me thinks you fellers ought to be mashing and cutting up more bullets. McAlice if you are bored go scam some more gun stores!

[Snake]

Thanks Mr McAlice. Those doubting can call Tommy Todd the ballistician at Sierra....he'll confirm my statements about size. Furthermore slower burning powders do not necessarily reduce pressure they simply slow its development. Pressure is also a function of bore condition (e.g. tight or loose smooth or rough clean or dirty) and chamber characteristics (e.g. throat-leade). But I stand by my statement that all things being equal...one can drive hunting bullets harder with less pressure signs...even though(or maybe because) the softer match bullet makes a tighter seal vis=a-vis the hunting bullet I'm assuming that nobody is going to try a case full of Bullseye

[kevinbear]

Pretty much all bullets vary in diameter depending on the day and the machine they came off of especially hunting bullets which seem to have more generous tolerances.

[Snake]

FYI at Sierra hunting bullets are at + or -6% whereas match bullets are + or - 3%....6% is the industry standard for all bullets. The tolerances explains why Sierra has 2nds on sale at their storefront. When a defect is observed the line is stopped and 10 projectiles either side of the boo-boo are removed as 2nds....ditto on blemishes and stains

[Bob Mc Alice]

Snake, I believe your "formula" is incorrect. 99.9% of manufacturing companies do not use percentages to determine close machined tolerances. Your 6 and 3 % would equal plus or minus .0017 and .0008 respectively on .284 bullets. I believe Sierra MK's diameters are held to plus .00005, minus zero.

Based on my findings of the three Mk's on the list, they make uniform match bullets. These were first quality projectiles, not seconds.

[Trent]

It's a fact that 95% of all statistics are made up.

[Bob Mc Alice]

"I read it on the internet"

[Trent]

"I read it on the internet"

"Bonjourno"