Speer Deepcurl bullets

Measure the diameter of the bullet, it will most likely be larger than .308, like around .3085. Look at some of there other data for the 30-06, 308, 300 win mag. The loads that I looked up are a bit under the normal speer data. How long you been reloading?

That is the largest diameter that I have heard of, I would wait until they contact you, and see what they say. I have used the 180s in my 300 win and 30-06 with great results, they measured .3085 inches. I would think they should not be that large in diameter. Good luck

Check your dial caliper for accuracy, .310"? That's .002" over the industry standard and at least .0015" bigger than anything I've ever seen on the market.

I don't know about other calibers, but the 170gr "Deep-Curl" and 170gr "Gold Dot" in .357 caliber looked to be identical in the pics I saw and even carry the same #4230 product number.

DWFan said:

I don't know about other calibers, but the 170gr "Deep-Curl" and 170gr "Gold Dot" in .357 caliber looked to be identical in the pics I saw and even carry the same #4230 product number.

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The Deep Curls are just Gold Dots renamed. I believe Speer did this to differentiate between their hunting style HPs and their SD HPs(which are still called Gold Dots). Funny, in the calibers I load the Deep Curls, in my Speer manual, the load recipes are the same for Deep Curls as they are for the same weight bullet in FMJ or standard HPs......and these load recipes fall in the same ranges as other makes of bullets of the same weight in other load manuals. Maybe something specific to the .30 cal RN?

It would be best to adhere to the data that Speer gave you. There is no reason to push an M1 carbine's design limits, as they are very happy at 2000 FPS and under, and will last much longer with medium power loads, and perhaps be more accurate.
That is, if you're using an M1 carbine rifle.


NCsmitty

The "deep curl" rifle bullets are deep fat sizzle as far as I'm concerned. The Hot-Cor bullets were just fine as they were.

Speer did not tell me anything about why these are special bullets

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They are "special" because they are not conventional cup & core jacketed bullets.

They have electroplated jackets.

The load data will be different for Speer Gold-Dot's, Deep Curls, or other plated bullets. Because they are special.

rc

The reason for using specific data for gold dots, or deep curls is because these bullets have a large deep hollow point cavity and in order to maintain a desirable weight per caliber they are longer than other bullets and are therefore seated deeper in the case than other bullets giving the same OAL.

As far as I can tell, just like GDs, they are a thick-plated bullet comparable to a jacketed bullet in terms of hardness and should be loaded just like a jacketed bullet.
I do not see any more magical voodoo to Deep Curl than I see for Gold Dots.
Start with the starting load and work up. When they cycle you M1 look for the charge that gives the best accuracy (unlikely to be Max).

noylj said:

As far as I can tell, just like GDs, they are a thick-plated bullet comparable to a jacketed bullet in terms of hardness and should be loaded just like a jacketed bullet.
I do not see any more magical voodoo to Deep Curl than I see for Gold Dots.

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.............again. The Deep Curl bullets are just the old Gold Dot hunting bullet renamed to avoid confusion with the Gold Dot SD/HD bullets. Go to the Speer website and they will tell you the same thing.

Same as Gold Dots? Maybe I'm a little behind in times here because the last time I checked, a Gold Dot was a handgun bullet. If I recall correctly, Speer says the Deep Curl is simular in design to their Hot Core with some small design changes to effect better expansion following initial penetration. Kind of in between the Hot Core and the Grand Slam. I use a lot of Speer bullets but haven't yet tried these yet, but when I do I will use a powder charge that is listed for other jacketed bullets of the same weight. In my Speer manuals, their powder charge data groups all their jacketed rifle bullets according to bullet weight as per cartridge.

The difference is HotCor uses a super thick gliding metal jacket vs Deep Curl or GD which use a relatively thin electroplated pure copper jacket. The two have different coefficients of friction, core alloy hardness, etc. and deserve different data.

I humble myself and appolgize, I was wrong. The Deep Curl is available in rifle and some popular handgun bullets. Also, I was wrong about the data being the same for any other jacketed bullet of same weight and cartridge. Speer states that you must use the data specific to this new bullet line.
The manufacturing process is in fact the same as the Gold Dot too, not anything like the Grand Slam or Hot Core.
I opened my mouth before having the informed knowledge and will try to avoid doing that in the future guys. Please odn't tar and feather me!

The Hot-Cor .264 140gr. was a great flat base spitzer with a bc .496 and a proven hunting performance. Speer replaced it with the Deep Curl .264 140gr. pill with a bc of .462. I have yet to find any comments positive or other on its terminal performance other than Speer's hype. Bullet companies that are stand alones seemed to focus on bullets.
Oh and as an added thought the Deep Curl = price increase.