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)

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

🔴Class IIIa red laser, 630-680nm wavelength

⚙️Precision brass machining for durability

94281CFA

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Description

🎯 Lock in your shot, skip the guesswork!

READY TO GO KIT - Includes 7 boresights plus AG3 batteries, so you’re fully equipped to enhance your hunting or tactical setup right out of the box.
LASER GUIDED ACCURACY - High-quality Class IIIa red laser with 630-680nm wavelength delivers sharp, visible aiming points to speed up your sighting process.
TIME COST EFFICIENT - Cut down on costly live-fire adjustments by zeroing your scope quickly and confidently before hitting the range or field.
CALIBER SPECIFIC PRECISION - 7 expertly crafted boresights tailored for popular calibers from 22LR to 45ACP, ensuring perfect fit and accuracy every time.
DURABLE BRASS CONSTRUCTION - Robust brass body with precision machining guarantees long-lasting performance and reliable alignment session after session.

The StrongTools BoreSighter Kit offers 7 caliber-specific brass boresights with a high-precision Class IIIa red laser (630-680nm, ≤4.9mW) designed to accelerate and improve rifle and handgun sighting accuracy. Compatible with popular calibers including 223REM, 9MM, 7.62X39MM, and more, this durable, ready-to-use kit saves time and money by reducing live-fire zeroing sessions.

Specifications

ASIN	B07JLFPJPK
Best Sellers Rank	#5,241 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #10 in Hunting Boresighters #1,704 in Hunting Equipment
Brand Name	StrongTools
Color	Gold
Compatible Devices	Handgun, Rifle
Customer Reviews	4.4 4.4 out of 5 stars (1,894)
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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94281CFA

Duties & taxes included

In stock

Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Senegal.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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