Will any of these work with a 300 win mag?

No, there is boresighter in this kit for this gun. But we have an universal boresighter will work it. It works very well for .17-12ga calibers. Please check it here: https://www.amazon.com/StrongTools-BoreSighter-Universal-Boresight-Batteries/dp/B07WQYDNW4/ref=sr_1_2?dchild=1&m=AEKCUJ929YEAX&marketplaceID=ATVPDKIKX0DER&qid=1593645890&s=merchant-items&sr=1-2 Thanks for your asking! Customer Team of StrongTools

Is it necessary to remove the extractor like with other bullet lasers?

I did not remove the extractor I just used the charging handle on my AR to slowly let the bolt carrier set on the laser, if you using a pistol one I just let the slide onto the laser slowly, there are instructions included with the bore sights.

sited .30-06 at about 20ft. how far is actually sited in at 100-200yards?

I sighted at 100 yards. It's best to start out close -- 40 yards or so -- then move out to a longer distance. I think your question lists 20 FEET --- and you probably meant 20 YARDS,

How close will this get you at 100 yards?

I am getting 5 round clusters in .625 inches at 100 meters

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BoreSighter for 22LR/223/9MM/7.62X39MM/30-30/30-06/.25/270/243/308/7MM/ 45ACP Colt Caliber Rifle Scope Handgun Brass Red Dot Boresight Kit for Hunting with AG3 Batteries (Special, Bullet Type)

BoreSighter for 22LR/223/9MM/7.62X39MM/30-30/30-06/.25/270/243/308/7MM/ 45ACP Colt Caliber Rifle Scope Handgun Brass Red Dot Boresight Kit for Hunting with AG3 Batteries (Special, Bullet Type)

Product ID: 99935709

Details

Brand
StrongTools
Color
Gold
Compatible Devices
Handgun Rifle
Item Weight
7.8 Ounces
Magnification Minimum
1 x 7 x
Material
Metal

🎯7 caliber-specific boresights

🔋Includes AG3 batteries for instant use

🛠️Precision brass construction

94394CFA

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Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🎯 Zero in like a pro—never miss your mark again!

PLUG PLAY POWER - Comes with ready-to-use AG3 batteries so you can zero in without delay—no extra purchases needed.
DURABLE BRASS BUILD - Crafted from high-quality brass with precision machining for long-lasting reliability and consistent performance.
LASER ACCURACY BOOST - Class IIIa red dot laser (630-680nm) enhances sighting speed and accuracy, saving you costly range time.
VERSATILE COMPATIBILITY - Fits both rifles and handguns with Picatinny mounts, perfect for hunters, shooters, and law enforcement pros.
CALIBER PERFECT PRECISION - 7 specialized boresights tailored for popular calibers from 22LR to 45ACP, ensuring flawless alignment every time.

The StrongTools BoreSighter Kit offers 7 caliber-specific brass boresights with a high-quality Class IIIa red dot laser powered by included AG3 batteries. Designed for rifles and handguns, it accelerates sighting accuracy and reduces costly live-fire adjustments, making it an essential precision tool for hunters, shooters, and law enforcement.

Specifications

ASIN	B07JLFPJPK
Best Sellers Rank	#5,136 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #9 in Hunting Boresighters #1,876 in Hunting Equipment
Brand Name	StrongTools
Color	Gold
Compatible Devices	Handgun, Rifle
Customer Reviews	4.4 4.4 out of 5 stars (1,913)
Item Weight	7.8 Ounces
Magnification Minimum	1 x, 7 x
Manufacturer	Dongguan Yijing Optoelectronics Technology Co., Ltd
Material Type	Metal
Model Name	Laser Bore Sight
Model Number	3006, 3030, 308WIN, 223, 9MM
Mounting Type	Picatinny Mount
Night vision	No
Reticle Type	Dot
Sport Type	Hunting
UPC	681381742255
Unit Count	7.0 Count

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